Upgrade Ember to v3.15.1

Author: janwerkhoven

.eslintrc.js

@@ -8,15 +8,20 @@ module.exports = {
       legacyDecorators: true
     }
   },
-  plugins: ['ember'],
-  extends: ['eslint:recommended', 'plugin:ember/recommended'],
+  plugins: ['ember', 'prettier'],
+  extends: [
+    'eslint:recommended',
+    'plugin:ember/recommended',
+    'plugin:prettier/recommended'
+  ],
   env: {
     browser: true
   },
   rules: {
     'ember/no-jquery': 'error',
     'ember/avoid-leaking-state-in-ember-objects': 'off',
-    'no-console': 'off'
+    'no-console': 'off',
+    'prettier/prettier': 'warn'
   },
   overrides: [
     // node files

.template-lintrc.js

@@ -1,5 +1,5 @@
 'use strict';
 
 module.exports = {
-  extends: 'recommended'
+  extends: 'octane'
 };

app/app.js

@@ -1,5 +1,5 @@
 import Application from '@ember/application';
-import Resolver from './resolver';
+import Resolver from 'ember-resolver';
 import loadInitializers from 'ember-load-initializers';
 import config from './config/environment';
 

config/optional-features.json

@@ -1,5 +1,6 @@
 {
   "application-template-wrapper": false,
+  "default-async-observers": true,
   "jquery-integration": false,
   "template-only-glimmer-components": true
 }

package.json

@@ -27,46 +27,50 @@
     "lint:js": "eslint ."
   },
   "devDependencies": {
-    "@ember/optional-features": "^1.0.0",
+    "@ember/optional-features": "^1.1.0",
+    "@glimmer/component": "^1.0.0",
     "babel-eslint": "^10.0.3",
     "broccoli-asset-rev": "^3.0.0",
     "corber": "1.4.2",
     "corber-ember-livereload": "^0.0.2",
-    "ember-auto-import": "^1.5.2",
-    "ember-cli": "~3.14.0",
+    "ember-auto-import": "^1.5.3",
+    "ember-cli": "~3.15.1",
     "ember-cli-app-version": "^3.2.0",
-    "ember-cli-babel": "^7.11.1",
-    "ember-cli-dependency-checker": "^3.1.0",
+    "ember-cli-babel": "^7.13.0",
+    "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-eslint": "^5.1.0",
-    "ember-cli-htmlbars": "^4.0.5",
+    "ember-cli-htmlbars": "^4.2.0",
     "ember-cli-inject-live-reload": "^2.0.1",
     "ember-cli-sass": "^10.0.1",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-template-lint": "^1.0.0-beta.3",
     "ember-cli-uglify": "^3.0.0",
     "ember-concurrency": "^1.1.3",
-    "ember-data": "~3.14.0",
-    "ember-export-application-global": "^2.0.0",
-    "ember-fetch": "^6.7.0",
+    "ember-data": "~3.15.0",
+    "ember-export-application-global": "^2.0.1",
+    "ember-fetch": "^7.0.0",
     "ember-get-config": "^0.2.4",
-    "ember-load-initializers": "^2.1.0",
+    "ember-load-initializers": "^2.1.1",
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-prop-types": "^9.0.2",
-    "ember-qunit": "^4.5.1",
-    "ember-resolver": "^5.3.0",
-    "ember-source": "~3.14.1",
+    "ember-qunit": "^4.6.0",
+    "ember-resolver": "^7.0.0",
+    "ember-source": "~3.15.0",
     "ember-truth-helpers": "^2.1.0",
-    "ember-welcome-page": "^4.0.0",
-    "eslint-plugin-ember": "^7.1.0",
+    "eslint-config-prettier": "^6.9.0",
+    "eslint-plugin-ember": "^7.7.1",
     "eslint-plugin-node": "^10.0.0",
+    "eslint-plugin-prettier": "^3.1.2",
+    "git-rev-sync": "^1.12.0",
     "loader.js": "^4.7.0",
-    "qunit-dom": "^0.9.0",
+    "prettier": "^1.19.1",
+    "qunit-dom": "^0.9.2",
     "sass": "^1.23.7"
   },
   "engines": {
     "node": "8.* || >= 10.*"
   },
-  "dependencies": {
-    "git-rev-sync": "^1.12.0"
+  "ember": {
+    "edition": "octane"
   }
 }