Upgrade Ember, and Friends, to 3.14

Note that ember-data has been moved to `devDependencies`. This is to
avoid stomping on the host application's copy.

Author: jherdman

.circleci/config.yml

@@ -102,6 +102,18 @@ jobs:
           command: |
             yarn ember try:one ember-lts-3.4 --skip-cleanup
 
+  run_younger_lts_tests:
+    <<: *defaults
+
+    steps:
+      - attach_workspace:
+          at: .
+
+      - run:
+          name: 'Run Tests for Ember 3.8'
+          command: |
+            yarn ember try:one ember-lts-3.8 --skip-cleanup
+
   run_beta_tests:
     <<: *defaults
 
@@ -164,6 +176,10 @@ workflows:
           requires:
             - run_default_tests
 
+      - run_younger_lts_tests:
+          requires:
+            - run_default_tests
+
       - run_beta_tests:
           requires:
             - run_default_tests

.eslintrc.js

@@ -3,7 +3,10 @@ module.exports = {
   parser: 'babel-eslint',
   parserOptions: {
     ecmaVersion: 2018,
-    sourceType: 'module'
+    sourceType: 'module',
+    ecmaFeatures: {
+      legacyDecorators: true
+    }
   },
   plugins: [
     'ember'

.npmignore

@@ -8,7 +8,7 @@
 # misc
 /.bowerrc
 /.editorconfig
-/.ember-cli
+/.ember-cli.js
 /.env*
 /.eslintignore
 /.eslintrc.js

package.json

@@ -22,27 +22,28 @@
   },
   "dependencies": {
     "ember-cli-babel": "^7.11.1",
-    "ember-cli-htmlbars": "^4.0.0",
-    "ember-data": "< 4"
+    "ember-cli-htmlbars": "^4.0.5"
   },
   "devDependencies": {
     "@ember/optional-features": "^1.0.0",
     "babel-eslint": "^10.0.3",
     "broccoli-asset-rev": "^3.0.0",
-    "ember-cli": "~3.13.1",
+    "ember-auto-import": "^1.5.2",
+    "ember-cli": "~3.14.0",
     "ember-cli-dependency-checker": "^3.1.0",
     "ember-cli-eslint": "^5.1.0",
     "ember-cli-inject-live-reload": "^2.0.1",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-template-lint": "^1.0.0-beta.3",
     "ember-cli-uglify": "^3.0.0",
+    "ember-data": "< 4",
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-export-application-global": "^2.0.0",
     "ember-load-initializers": "^2.1.0",
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-qunit": "^4.5.1",
     "ember-resolver": "^5.3.0",
-    "ember-source": "~3.13.0",
+    "ember-source": "~3.14.1",
     "ember-source-channel-url": "^2.0.1",
     "ember-try": "^1.2.1",
     "eslint-plugin-ember": "^7.1.0",

tests/dummy/app/app.js

@@ -3,12 +3,10 @@ import Resolver from './resolver';
 import loadInitializers from 'ember-load-initializers';
 import config from './config/environment';
 
-const App = Application.extend({
-  modulePrefix: config.modulePrefix,
-  podModulePrefix: config.podModulePrefix,
-  Resolver
-});
+export default class App extends Application {
+  modulePrefix = config.modulePrefix;
+  podModulePrefix = config.podModulePrefix;
+  Resolver = Resolver;
+}
 
 loadInitializers(App, config.modulePrefix);
-
-export default App;

tests/dummy/app/router.js

@@ -1,12 +1,10 @@
 import EmberRouter from '@ember/routing/router';
 import config from './config/environment';
 
-const Router = EmberRouter.extend({
-  location: config.locationType,
-  rootURL: config.rootURL
-});
+export default class Router extends EmberRouter {
+  location = config.locationType;
+  rootURL = config.rootURL;
+}
 
 Router.map(function() {
 });
-
-export default Router;