diff --git a/.travis.yml b/.travis.yml
index c02a501..d0b6040 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 ---
 language: node_js
 node_js:
-  - "6"
+  - "8"
 
 sudo: false
 dist: trusty
@@ -51,7 +51,6 @@ jobs:
 
 before_install:
   - npm config set spin false
-  - npm install -g npm@4
   - npm --version
 
 script:
diff --git a/package-lock.json b/package-lock.json
index 4ceba62..d693d71 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,16 +13,16 @@
       }
     },
     "@babel/core": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.4.4.tgz",
-      "integrity": "sha512-lQgGX3FPRgbz2SKmhMtYgJvVzGZrmjaF4apZ2bLwofAKiSjxU0drPh4S/VasyYXwaTs+A1gvQ45BN8SQJzHsQQ==",
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.4.5.tgz",
+      "integrity": "sha512-OvjIh6aqXtlsA8ujtGKfC7LYWksYSX8yQcM8Ay3LuvVeQ63lcOKgoZWVqcpFwkd29aYU9rVx7jxhfhiEDV9MZA==",
       "requires": {
         "@babel/code-frame": "^7.0.0",
         "@babel/generator": "^7.4.4",
         "@babel/helpers": "^7.4.4",
-        "@babel/parser": "^7.4.4",
+        "@babel/parser": "^7.4.5",
         "@babel/template": "^7.4.4",
-        "@babel/traverse": "^7.4.4",
+        "@babel/traverse": "^7.4.5",
         "@babel/types": "^7.4.4",
         "convert-source-map": "^1.1.0",
         "debug": "^4.1.0",
@@ -267,9 +267,9 @@
       }
     },
     "@babel/parser": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.4.4.tgz",
-      "integrity": "sha512-5pCS4mOsL+ANsFZGdvNLybx4wtqAZJ0MJjMHxvzI3bvIsz6sQvzW8XX92EYIkiPtIvcfG3Aj+Ir5VNyjnZhP7w=="
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.4.5.tgz",
+      "integrity": "sha512-9mUqkL1FF5T7f0WDFfAoDdiMVPWsdD1gZYzSnaXsxUCUqzuch/8of9G3VUSNiZmMBoRxT3neyVsqeiL/ZPcjew=="
     },
     "@babel/plugin-proposal-async-generator-functions": {
       "version": "7.2.0",
@@ -541,11 +541,11 @@
       }
     },
     "@babel/plugin-transform-named-capturing-groups-regex": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-named-capturing-groups-regex/-/plugin-transform-named-capturing-groups-regex-7.4.4.tgz",
-      "integrity": "sha512-Ki+Y9nXBlKfhD+LXaRS7v95TtTGYRAf9Y1rTDiE75zf8YQz4GDaWRXosMfJBXxnk88mGFjWdCRIeqDbon7spYA==",
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-named-capturing-groups-regex/-/plugin-transform-named-capturing-groups-regex-7.4.5.tgz",
+      "integrity": "sha512-z7+2IsWafTBbjNsOxU/Iv5CvTJlr5w4+HGu1HovKYTtgJ362f7kBcQglkfmlspKKZ3bgrbSGvLfNx++ZJgCWsg==",
       "requires": {
-        "regexp-tree": "^0.1.0"
+        "regexp-tree": "^0.1.6"
       }
     },
     "@babel/plugin-transform-new-target": {
@@ -584,11 +584,11 @@
       }
     },
     "@babel/plugin-transform-regenerator": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-regenerator/-/plugin-transform-regenerator-7.4.4.tgz",
-      "integrity": "sha512-Zz3w+pX1SI0KMIiqshFZkwnVGUhDZzpX2vtPzfJBKQQq8WsP/Xy9DNdELWivxcKOCX/Pywge4SiEaPaLtoDT4g==",
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-regenerator/-/plugin-transform-regenerator-7.4.5.tgz",
+      "integrity": "sha512-gBKRh5qAaCWntnd09S8QC7r3auLCqq5DI6O0DlfoyDjslSBVqBibrMdsqO+Uhmx3+BlOmE/Kw1HFxmGbv0N9dA==",
       "requires": {
-        "regenerator-transform": "^0.13.4"
+        "regenerator-transform": "^0.14.0"
       }
     },
     "@babel/plugin-transform-reserved-words": {
@@ -672,9 +672,9 @@
       }
     },
     "@babel/preset-env": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/preset-env/-/preset-env-7.4.4.tgz",
-      "integrity": "sha512-FU1H+ACWqZZqfw1x2G1tgtSSYSfxJLkpaUQL37CenULFARDo+h4xJoVHzRoHbK+85ViLciuI7ME4WTIhFRBBlw==",
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/@babel/preset-env/-/preset-env-7.4.5.tgz",
+      "integrity": "sha512-f2yNVXM+FsR5V8UwcFeIHzHWgnhXg3NpRmy0ADvALpnhB0SLbCvrCRr4BLOUYbQNLS+Z0Yer46x9dJXpXewI7w==",
       "requires": {
         "@babel/helper-module-imports": "^7.0.0",
         "@babel/helper-plugin-utils": "^7.0.0",
@@ -705,12 +705,12 @@
         "@babel/plugin-transform-modules-commonjs": "^7.4.4",
         "@babel/plugin-transform-modules-systemjs": "^7.4.4",
         "@babel/plugin-transform-modules-umd": "^7.2.0",
-        "@babel/plugin-transform-named-capturing-groups-regex": "^7.4.4",
+        "@babel/plugin-transform-named-capturing-groups-regex": "^7.4.5",
         "@babel/plugin-transform-new-target": "^7.4.4",
         "@babel/plugin-transform-object-super": "^7.2.0",
         "@babel/plugin-transform-parameters": "^7.4.4",
         "@babel/plugin-transform-property-literals": "^7.2.0",
-        "@babel/plugin-transform-regenerator": "^7.4.4",
+        "@babel/plugin-transform-regenerator": "^7.4.5",
         "@babel/plugin-transform-reserved-words": "^7.2.0",
         "@babel/plugin-transform-shorthand-properties": "^7.2.0",
         "@babel/plugin-transform-spread": "^7.2.0",
@@ -719,17 +719,17 @@
         "@babel/plugin-transform-typeof-symbol": "^7.2.0",
         "@babel/plugin-transform-unicode-regex": "^7.4.4",
         "@babel/types": "^7.4.4",
-        "browserslist": "^4.5.2",
-        "core-js-compat": "^3.0.0",
+        "browserslist": "^4.6.0",
+        "core-js-compat": "^3.1.1",
         "invariant": "^2.2.2",
         "js-levenshtein": "^1.1.3",
         "semver": "^5.5.0"
       }
     },
     "@babel/runtime": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.4.4.tgz",
-      "integrity": "sha512-w0+uT71b6Yi7i5SE0co4NioIpSYS6lLiXvCzWzGSKvpK5vdQtCbICHMj+gbAKAOtxiV6HsVh/MBdaF9EQ6faSg==",
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.4.5.tgz",
+      "integrity": "sha512-TuI4qpWZP6lGOGIuGWtp9sPluqYICmbk8T/1vpSysqJxRPkudh/ofFWyqdcMsDf2s7KvDL4/YHgKyvcS3g9CJQ==",
       "requires": {
         "regenerator-runtime": "^0.13.2"
       }
@@ -745,15 +745,15 @@
       }
     },
     "@babel/traverse": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.4.4.tgz",
-      "integrity": "sha512-Gw6qqkw/e6AGzlyj9KnkabJX7VcubqPtkUQVAwkc0wUMldr3A/hezNB3Rc5eIvId95iSGkGIOe5hh1kMKf951A==",
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.4.5.tgz",
+      "integrity": "sha512-Vc+qjynwkjRmIFGxy0KYoPj4FdVDxLej89kMHFsWScq999uX+pwcX4v9mWRjW0KcAYTPAuVQl2LKP1wEVLsp+A==",
       "requires": {
         "@babel/code-frame": "^7.0.0",
         "@babel/generator": "^7.4.4",
         "@babel/helper-function-name": "^7.1.0",
         "@babel/helper-split-export-declaration": "^7.4.4",
-        "@babel/parser": "^7.4.4",
+        "@babel/parser": "^7.4.5",
         "@babel/types": "^7.4.4",
         "debug": "^4.1.0",
         "globals": "^11.1.0",
@@ -846,27 +846,6 @@
         "ember-assign-polyfill": "^2.6.0",
         "ember-cli-babel": "^7.4.3",
         "ember-cli-htmlbars-inline-precompile": "^2.1.0"
-      },
-      "dependencies": {
-        "babel-plugin-htmlbars-inline-precompile": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/babel-plugin-htmlbars-inline-precompile/-/babel-plugin-htmlbars-inline-precompile-1.0.0.tgz",
-          "integrity": "sha512-4jvKEHR1bAX03hBDZ94IXsYCj3bwk9vYsn6ux6JZNL2U5pvzCWjqyrGahfsGNrhERyxw8IqcirOi9Q6WCo3dkQ==",
-          "dev": true
-        },
-        "ember-cli-htmlbars-inline-precompile": {
-          "version": "2.1.0",
-          "resolved": "https://registry.npmjs.org/ember-cli-htmlbars-inline-precompile/-/ember-cli-htmlbars-inline-precompile-2.1.0.tgz",
-          "integrity": "sha512-BylIHduwQkncPhnj0ZyorBuljXbTzLgRo6kuHf1W+IHFxThFl2xG+r87BVwsqx4Mn9MTgW9SE0XWjwBJcSWd6Q==",
-          "dev": true,
-          "requires": {
-            "babel-plugin-htmlbars-inline-precompile": "^1.0.0",
-            "ember-cli-version-checker": "^2.1.2",
-            "hash-for-dep": "^1.2.3",
-            "heimdalljs-logger": "^0.1.9",
-            "silent-error": "^1.1.0"
-          }
-        }
       }
     },
     "@glimmer/compiler": {
@@ -984,11 +963,16 @@
       "integrity": "sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA=="
     },
     "@types/node": {
-      "version": "11.13.9",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-11.13.9.tgz",
-      "integrity": "sha512-NJ4yuEVw5podZbINp3tEqUIImMSAEHaCXRiWCf3KC32l6hIKf0iPJEh2uZdT0fELfRYk310yLmMXqy2leZQUbg==",
+      "version": "12.0.5",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-12.0.5.tgz",
+      "integrity": "sha512-CFLSALoE+93+Hcb5pFjp0J1uMrrbLRe+L1+gFwerJ776R3TACSF0kTVRQ7AvRa7aFx70nqYHAc7wQPlt9kY2Mg==",
       "dev": true
     },
+    "@types/symlink-or-copy": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@types/symlink-or-copy/-/symlink-or-copy-1.2.0.tgz",
+      "integrity": "sha512-Lja2xYuuf2B3knEsga8ShbOdsfNOtzT73GyJmZyY7eGl2+ajOqrs8yM5ze0fsSoYwvA6bw7/Qr7OZ7PEEmYwWg=="
+    },
     "abbrev": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
@@ -1250,9 +1234,9 @@
       "dev": true
     },
     "async-promise-queue": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/async-promise-queue/-/async-promise-queue-1.0.4.tgz",
-      "integrity": "sha512-GQ5X3DT+TefYuFPHdvIPXFTlKnh39U7dwtl+aUBGeKjMea9nBpv3c91DXgeyBQmY07vQ97f3Sr9XHqkamEameQ==",
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/async-promise-queue/-/async-promise-queue-1.0.5.tgz",
+      "integrity": "sha512-xi0aQ1rrjPWYmqbwr18rrSKbSaXIeIwSd1J4KAgVfkq8utNbdZoht7GfvfY6swFUAMJ9obkc4WPJmtGwl+B8dw==",
       "requires": {
         "async": "^2.4.1",
         "debug": "^2.6.8"
@@ -1572,9 +1556,9 @@
       },
       "dependencies": {
         "glob": {
-          "version": "7.1.3",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.3.tgz",
-          "integrity": "sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==",
+          "version": "7.1.4",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.4.tgz",
+          "integrity": "sha512-hkLPepehmnKk41pUGm3sYxoFs/umurYfYJCerbXEyFIWcAzvpipAgVkBqqT9RBKMGjnq6kMuyYwha6csxbiM1A==",
           "requires": {
             "fs.realpath": "^1.0.0",
             "inflight": "^1.0.4",
@@ -2248,9 +2232,9 @@
       "dev": true
     },
     "bluebird": {
-      "version": "3.5.4",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.4.tgz",
-      "integrity": "sha512-FG+nFEZChJrbQ9tIccIfZJBz3J7mLrAhxakAbnrJWn8d7aKOC+LWifa0G+p4ZqKp4y13T7juYvdhq9NzKdsrjw==",
+      "version": "3.5.5",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.5.tgz",
+      "integrity": "sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w==",
       "dev": true
     },
     "body": {
@@ -2290,31 +2274,47 @@
       }
     },
     "body-parser": {
-      "version": "1.18.3",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
-      "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
       "dev": true,
       "requires": {
-        "bytes": "3.0.0",
+        "bytes": "3.1.0",
         "content-type": "~1.0.4",
         "debug": "2.6.9",
         "depd": "~1.1.2",
-        "http-errors": "~1.6.3",
-        "iconv-lite": "0.4.23",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
         "on-finished": "~2.3.0",
-        "qs": "6.5.2",
-        "raw-body": "2.3.3",
-        "type-is": "~1.6.16"
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
       },
       "dependencies": {
-        "iconv-lite": {
-          "version": "0.4.23",
-          "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.23.tgz",
-          "integrity": "sha512-neyTUVFtahjf0mB3dZT77u+8O0QB89jFdnBkd5P1JgYPbPaia3gXXOVL2fq8VyU2gMMD7SaN7QukTB/pmXYvDA==",
+        "bytes": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
+          "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==",
+          "dev": true
+        },
+        "http-errors": {
+          "version": "1.7.2",
+          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.7.2.tgz",
+          "integrity": "sha512-uUQBt3H/cSIVfch6i1EuPNy/YsRSOUBXTVfZ+yR7Zjez3qjBz6i9+i4zjNaoqcoFVI4lQJ5plg63TvGfRSDCRg==",
           "dev": true,
           "requires": {
-            "safer-buffer": ">= 2.1.2 < 3"
+            "depd": "~1.1.2",
+            "inherits": "2.0.3",
+            "setprototypeof": "1.1.1",
+            "statuses": ">= 1.5.0 < 2",
+            "toidentifier": "1.0.0"
           }
+        },
+        "setprototypeof": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
+          "integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw==",
+          "dev": true
         }
       }
     },
@@ -2817,14 +2817,14 @@
       "dev": true
     },
     "broccoli-persistent-filter": {
-      "version": "2.2.2",
-      "resolved": "https://registry.npmjs.org/broccoli-persistent-filter/-/broccoli-persistent-filter-2.2.2.tgz",
-      "integrity": "sha512-PW12RD1yY+x5SASUADuUMJce+dVSmjBO3pV1rLNHmT1C31rp1P++TvX7AgUObFmGhL7qlwviSdhMbBkY1v3G2w==",
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/broccoli-persistent-filter/-/broccoli-persistent-filter-2.2.3.tgz",
+      "integrity": "sha512-WSq6S9lC78LZ2T6L8s+NueEDuWdVSDiwjH8XbHo4ocL7V5fZLXupxvnPWtoH2Jp20j6/nvznTkgKJC4g70JVdA==",
       "requires": {
         "async-disk-cache": "^1.2.1",
         "async-promise-queue": "^1.0.3",
         "broccoli-plugin": "^1.0.0",
-        "fs-tree-diff": "^1.0.2",
+        "fs-tree-diff": "^2.0.0",
         "hash-for-dep": "^1.5.0",
         "heimdalljs": "^0.2.1",
         "heimdalljs-logger": "^0.1.7",
@@ -2837,10 +2837,11 @@
       },
       "dependencies": {
         "fs-tree-diff": {
-          "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/fs-tree-diff/-/fs-tree-diff-1.0.2.tgz",
-          "integrity": "sha512-Zro2ACaPVDgVOx9+s5s5AfPlAD0kMJdbwGvTGF6KC1SjxjiGWxJvV4mUTDkFVSy3OUw2C/f1qpdjF81hGqSBAw==",
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/fs-tree-diff/-/fs-tree-diff-2.0.1.tgz",
+          "integrity": "sha512-x+CfAZ/lJHQqwlD64pYM5QxWjzWhSjroaVsr8PW831zOApL55qPibed0c+xebaLWVr2BnHFoHdrwOv8pzt8R5A==",
           "requires": {
+            "@types/symlink-or-copy": "^1.2.0",
             "heimdalljs-logger": "^0.1.7",
             "object-assign": "^4.1.0",
             "path-posix": "^1.0.0",
@@ -3070,13 +3071,13 @@
       }
     },
     "browserslist": {
-      "version": "4.5.6",
-      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.5.6.tgz",
-      "integrity": "sha512-o/hPOtbU9oX507lIqon+UvPYqpx3mHc8cV3QemSBTXwkG8gSQSK6UKvXcE/DcleU3+A59XTUHyCvZ5qGy8xVAg==",
+      "version": "4.6.1",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.6.1.tgz",
+      "integrity": "sha512-1MC18ooMPRG2UuVFJTHFIAkk6mpByJfxCrnUyvSlu/hyQSFHMrlhM02SzNuCV+quTP4CKmqtOMAIjrifrpBJXQ==",
       "requires": {
-        "caniuse-lite": "^1.0.30000963",
-        "electron-to-chromium": "^1.3.127",
-        "node-releases": "^1.1.17"
+        "caniuse-lite": "^1.0.30000971",
+        "electron-to-chromium": "^1.3.137",
+        "node-releases": "^1.1.21"
       }
     },
     "bser": {
@@ -3207,9 +3208,9 @@
       }
     },
     "caniuse-lite": {
-      "version": "1.0.30000966",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30000966.tgz",
-      "integrity": "sha512-qqLQ/uYrpZmFhPY96VuBkMEo8NhVFBZ9y/Bh+KnvGzGJ5I8hvpIaWlF2pw5gqe4PLAL+ZjsPgMOvoXSpX21Keg=="
+      "version": "1.0.30000973",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30000973.tgz",
+      "integrity": "sha512-/F3t/Yo8LEdRSEPCmI15fLu5vepVh9UCg/9inJXF5AAfW7xRRJkbaM2ut52iRMQMnGCLQouLbFdbOA+VEFOIsg=="
     },
     "capture-exit": {
       "version": "2.0.0",
@@ -3464,9 +3465,9 @@
       }
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+      "integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==",
+      "dev": true
+    },
     "tree-sync": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/tree-sync/-/tree-sync-1.4.0.tgz",
@@ -11017,9 +11017,9 @@
       "dev": true
     },
     "uglify-js": {
-      "version": "3.5.10",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.5.10.tgz",
-      "integrity": "sha512-/GTF0nosyPLbdJBd+AwYiZ+Hu5z8KXWnO0WCGt1BQ/u9Iamhejykqmz5o1OHJ53+VAk6xVxychonnApDjuqGsw==",
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.0.tgz",
+      "integrity": "sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==",
       "dev": true,
       "optional": true,
       "requires": {
@@ -11378,9 +11378,9 @@
       }
     },
     "write-file-atomic": {
-      "version": "2.4.2",
-      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.2.tgz",
-      "integrity": "sha512-s0b6vB3xIVRLWywa6X9TOMA7k9zio0TMOsl9ZnDkliA/cfJlpHXAscj0gbHVJiTdIuAYpIyqS5GW91fqm6gG5g==",
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.3.tgz",
+      "integrity": "sha512-GaETH5wwsX+GcnzhPgKcKjJ6M2Cq3/iZp1WyY/X1CSqrW+jVNM9Y7D8EC2sM4ZG/V8wZlSniJnCKWPmBYAucRQ==",
       "dev": true,
       "requires": {
         "graceful-fs": "^4.1.11",
diff --git a/package.json b/package.json
index 3614f1f..7218ac5 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "qunit-dom": "^0.8.0"
   },
   "engines": {
-    "node": "6.* || 8.* || >= 10.*"
+    "node": "8.* || >= 10.*"
   },
   "ember-addon": {
     "configPath": "tests/dummy/config"