Update Ember CLI from v3.15.1...v3.16.0

Updated blueprints and bumped netlify node version as this drops node
8.

.editorconfig

@@ -4,7 +4,6 @@
 
 root = true
 
-
 [*]
 end_of_line = lf
 charset = utf-8

.nvmrc

@@ -0,0 +1 @@
+10

LICENSE.md

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2019
+Copyright (c) 2020
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

README.md

@@ -13,9 +13,9 @@ It is built using EmberJS and takes advantage of the awesome [Sharp](https://git
 Compatibility
 ------------------------------------------------------------------------------
 
-* Ember.js v3.8 or above
+* Ember.js v3.12 or above
 * Ember CLI v2.13 or above
-* Node.js v8 or above
+* Node.js v10 or above
 
 
 Installation

config/ember-try.js

@@ -6,18 +6,18 @@ module.exports = async function() {
   return {
     scenarios: [
       {
-        name: 'ember-lts-3.8',
+        name: 'ember-lts-3.12',
         npm: {
           devDependencies: {
-            'ember-source': '~3.8.0'
+            'ember-source': '~3.12.0'
           }
         }
       },
       {
-        name: 'ember-lts-3.12',
+        name: 'ember-lts-3.16',
         npm: {
           devDependencies: {
-            'ember-source': '~3.12.0'
+            'ember-source': '~3.16.0'
           }
         }
       },

package.json

@@ -16,7 +16,7 @@
     "test": "tests"
   },
   "scripts": {
-    "build": "ember build",
+    "build": "ember build --environment=production",
     "lint:hbs": "ember-template-lint .",
     "lint:js": "eslint .",
     "start": "ember serve",
@@ -27,21 +27,22 @@
     "broccoli-caching-writer": "^3.0.3",
     "broccoli-funnel": "^2.0.1",
     "broccoli-merge-trees": "^3.0.0",
-    "ember-cli-babel": "^7.13.0",
-    "ember-cli-htmlbars": "^4.2.0",
+    "ember-cli-babel": "^7.17.2",
+    "ember-cli-htmlbars": "^4.2.2",
     "rsvp": "^4.7.0",
     "sharp": "^0.24.1"
   },
   "devDependencies": {
-    "@ember/optional-features": "^1.1.0",
+    "@ember/optional-features": "^1.3.0",
     "@glimmer/component": "^1.0.0",
+    "@glimmer/tracking": "^1.0.0",
     "babel-eslint": "^10.0.3",
     "broccoli-asset-rev": "^3.0.0",
     "ember-auto-import": "^1.5.3",
-    "ember-cli": "~3.15.1",
+    "ember-cli": "~3.16.0",
     "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-eslint": "^5.1.0",
-    "ember-cli-inject-live-reload": "^2.0.1",
+    "ember-cli-inject-live-reload": "^2.0.2",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-template-lint": "^1.0.0-beta.3",
     "ember-cli-uglify": "^3.0.0",
@@ -51,16 +52,16 @@
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-qunit": "^4.6.0",
     "ember-resolver": "^7.0.0",
-    "ember-source": "~3.15.0",
+    "ember-source": "~3.16.0",
     "ember-source-channel-url": "^2.0.1",
     "ember-try": "^1.4.0",
-    "eslint-plugin-ember": "^7.7.1",
-    "eslint-plugin-node": "^10.0.0",
+    "eslint-plugin-ember": "^7.7.2",
+    "eslint-plugin-node": "^11.0.0",
     "loader.js": "^4.7.0",
-    "qunit-dom": "^0.9.2"
+    "qunit-dom": "^1.0.0"
   },
   "engines": {
-    "node": "8.* || >= 10.*"
+    "node": "10.* || >= 12"
   },
   "ember": {
     "edition": "octane"

testem.js

@@ -7,6 +7,7 @@ module.exports = {
   launch_in_dev: [
     'Chrome'
   ],
+  browser_start_timeout: 120,
   browser_args: {
     Chrome: {
       ci: [