Upgrade dependencies

.eslintrc.js

@@ -1,7 +1,7 @@
 module.exports = {
   root: true,
   parserOptions: {
-    ecmaVersion: 2017,
+    ecmaVersion: 2018,
     sourceType: 'module'
   },
   plugins: ['ember', 'prettier'],
@@ -34,8 +34,7 @@ module.exports = {
         'tests/dummy/app/**'
       ],
       parserOptions: {
-        sourceType: 'script',
-        ecmaVersion: 2015
+        sourceType: 'script'
       },
       env: {
         browser: false,

.gitignore

@@ -9,6 +9,8 @@
 /node_modules/
 
 # misc
+/.env*
+/.pnp*
 /.sass-cache
 /connect.lock
 /coverage/

.npmignore

@@ -9,6 +9,7 @@
 /.bowerrc
 /.editorconfig
 /.ember-cli
+/.env*
 /.eslintignore
 /.eslintrc.js
 /.gitignore

.travis.yml

@@ -2,7 +2,7 @@ language: node_js
 node_js:
   # we recommend testing addons with the same minimum supported node version as Ember CLI
   # so that your addon works for all apps
-  - '6'
+  - '8'
 
 sudo: false
 dist: trusty
@@ -41,13 +41,11 @@ jobs:
     # we recommend new addons test the current and previous LTS
     # as well as latest stable release (bonus points to beta/canary)
     - stage: 'Additional Tests'
-      env: EMBER_TRY_SCENARIO=ember-lts-2.12
-      env: EMBER_TRY_SCENARIO=ember-lts-2.16
-    - env: EMBER_TRY_SCENARIO=ember-lts-2.18
+      env: EMBER_TRY_SCENARIO=ember-lts-3.4
+    - env: EMBER_TRY_SCENARIO=ember-lts-3.8
     - env: EMBER_TRY_SCENARIO=ember-release
     - env: EMBER_TRY_SCENARIO=ember-beta
     - env: EMBER_TRY_SCENARIO=ember-canary
-    - env: EMBER_TRY_SCENARIO=ember-default-with-jquery
 
 script:
   - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO

config/ember-try.js

@@ -2,95 +2,50 @@
 
 const getChannelURL = require('ember-source-channel-url');
 
-module.exports = function() {
-  return Promise.all([
-    getChannelURL('release'),
-    getChannelURL('beta'),
-    getChannelURL('canary')
-  ]).then(urls => {
-    return {
-      useYarn: true,
-      scenarios: [
-        {
-          name: 'ember-lts-2.12',
-          env: {
-            EMBER_OPTIONAL_FEATURES: JSON.stringify({
-              'jquery-integration': true
-            })
-          },
-          npm: {
-            devDependencies: {
-              '@ember/jquery': '^0.5.1',
-              'ember-source': '~2.12.0'
-            }
+module.exports = async function() {
+  return {
+    useYarn: true,
+    scenarios: [
+      {
+        name: 'ember-lts-3.4',
+        npm: {
+          devDependencies: {
+            'ember-source': '~3.4.0'
           }
-        },
-        {
-          name: 'ember-lts-2.16',
-          env: {
-            EMBER_OPTIONAL_FEATURES: JSON.stringify({
-              'jquery-integration': true
-            })
-          },
-          npm: {
-            devDependencies: {
-              '@ember/jquery': '^0.5.1',
-              'ember-source': '~2.16.0'
-            }
-          }
-        },
-        {
-          name: 'ember-lts-2.18',
-          env: {
-            EMBER_OPTIONAL_FEATURES: JSON.stringify({
-              'jquery-integration': true
-            })
-          },
-          npm: {
-            devDependencies: {
-              '@ember/jquery': '^0.5.1',
-              'ember-source': '~2.18.0'
-            }
-          }
-        },
-        {
-          name: 'ember-release',
-          npm: {
-            devDependencies: {
-              'ember-source': urls[0]
-            }
+        }
+      },
+      {
+        name: 'ember-lts-3.8',
+        npm: {
+          devDependencies: {
+            'ember-source': '~3.8.0'
           }
-        },
-        {
-          name: 'ember-beta',
-          npm: {
-            devDependencies: {
-              'ember-source': urls[1]
-            }
+        }
+      },
+      {
+        name: 'ember-release',
+        npm: {
+          devDependencies: {
+            'ember-source': await getChannelURL('release')
           }
-        },
-        {
-          name: 'ember-canary',
-          npm: {
-            devDependencies: {
-              'ember-source': urls[2]
-            }
+        }
+      },
+      {
+        name: 'ember-beta',
+        npm: {
+          devDependencies: {
+            'ember-source': await getChannelURL('beta')
           }
-        },
-        {
-          name: 'ember-default-with-jquery',
-          env: {
-            EMBER_OPTIONAL_FEATURES: JSON.stringify({
-              'jquery-integration': true
-            })
-          },
-          npm: {
-            devDependencies: {
-              '@ember/jquery': '^0.5.1'
-            }
+        }
+      },
+      {
+        name: 'ember-canary',
+        npm: {
+          devDependencies: {
+            'ember-source': await getChannelURL('canary')
           }
         }
-      ]
-    };
-  });
+      }
+    ]
+  };
 };

package.json

@@ -35,34 +35,34 @@
     "babel-plugin-emotion": "^10.0.5",
     "broccoli-funnel": "^2.0.1",
     "broccoli-merge-trees": "^3.0.2",
-    "ember-cli-babel": "^7.2.0",
+    "ember-cli-babel": "^7.7.3",
     "ember-cli-version-checker": "^2.1.2",
-    "ember-code-snippet": "^2.3.1",
     "emotion": "^10.0.5",
     "semver": "^5.6.0"
   },
   "devDependencies": {
-    "@ember/optional-features": "^0.6.3",
-    "broccoli-asset-rev": "^2.7.0",
-    "ember-cli": "~3.6.0",
-    "ember-cli-dependency-checker": "^3.0.0",
+    "@ember/optional-features": "^0.7.0",
+    "broccoli-asset-rev": "^3.0.0",
+    "ember-cli": "~3.12.0",
+    "ember-cli-dependency-checker": "^3.1.0",
     "ember-cli-fastboot": "^2.0.0",
     "ember-cli-github-pages": "^0.2.1",
-    "ember-cli-htmlbars": "^3.0.0",
-    "ember-cli-htmlbars-inline-precompile": "^1.0.3",
-    "ember-cli-inject-live-reload": "^1.8.2",
+    "ember-cli-htmlbars": "^3.0.1",
+    "ember-cli-htmlbars-inline-precompile": "^2.1.0",
+    "ember-cli-inject-live-reload": "^1.10.0",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-template-lint": "^1.0.0-beta.1",
     "ember-cli-uglify": "^2.1.0",
+    "ember-code-snippet": "^2.3.1",
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-export-application-global": "^2.0.0",
     "ember-head": "^0.1.0",
-    "ember-load-initializers": "^1.1.0",
+    "ember-load-initializers": "^2.0.0",
     "ember-maybe-import-regenerator": "^0.1.6",
-    "ember-qunit": "^3.4.1",
-    "ember-qunit-assert-helpers": "^0.2.1",
+    "ember-qunit": "^4.4.1",
+    "ember-qunit-assert-helpers": "^0.2.2",
     "ember-resolver": "^5.0.1",
-    "ember-source": "~3.6.0",
+    "ember-source": "~3.12.0",
     "ember-source-channel-url": "^1.1.0",
     "ember-test-selectors": "^1.0.0",
     "ember-try": "^1.0.0",
@@ -73,14 +73,11 @@
     "eslint-plugin-prettier": "^3.0.1",
     "loader.js": "^4.7.0",
     "prettier": "^1.15.3",
-    "qunit-dom": "^0.8.0",
+    "qunit-dom": "^0.8.4",
     "standard-version": "^4.4.0"
   },
-  "peerDependencies": {
-    "ember-cli": ">= 2.15.0"
-  },
   "engines": {
-    "node": "6.* || 8.* || >= 10.*"
+    "node": "8.* || >= 10.*"
   },
   "ember-addon": {
     "configPath": "tests/dummy/config",

testem.js

@@ -9,7 +9,6 @@ module.exports = {
         // --no-sandbox is needed when running Chrome inside a container
         process.env.CI ? '--no-sandbox' : null,
         '--headless',
-        '--disable-gpu',
         '--disable-dev-shm-usage',
         '--disable-software-rasterizer',
         '--mute-audio',