Make all tests pass

.eslintrc.js

@@ -1,7 +1,7 @@
 module.exports = {
   root: true,
   parserOptions: {
-    ecmaVersion: 2017,
+    ecmaVersion: 2018,
     sourceType: 'module',
   },
   plugins: ['prettier', 'ember'],

.travis.yml

@@ -3,7 +3,7 @@ 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
@@ -12,7 +12,8 @@ addons:
   chrome: stable
 
 cache:
-  yarn: true
+  directories:
+    - $HOME/.npm
 
 env:
   global:
@@ -50,12 +51,5 @@ jobs:
     - env: EMBER_TRY_SCENARIO=ember-canary
     - env: EMBER_TRY_SCENARIO=ember-default-with-jquery
 
-before_install:
-  - curl -o- -L https://yarnpkg.com/install.sh | bash
-  - export PATH=$HOME/.yarn/bin:$PATH
-
-install:
-  - yarn install --no-lockfile --non-interactive
-
 script:
   - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO

README.md

@@ -9,6 +9,7 @@ Compatibility
 
 * Ember.js v2.18 or above
 * Ember CLI v2.13 or above
+* Node.js v8 or above
 
 
 Installation

package.json

@@ -28,43 +28,42 @@
   },
   "dependencies": {
     "ember-auto-import": "^1.3.0",
-    "ember-cli-babel": "^7.1.2",
-    "ember-cli-htmlbars": "^3.0.0",
+    "ember-cli-babel": "^7.7.3",
+    "ember-cli-htmlbars": "^3.0.1",
     "justified-layout": "^2.1.1"
   },
   "devDependencies": {
-    "@ember/optional-features": "^0.6.3",
-    "broccoli-asset-rev": "^2.7.0",
-    "ember-cli": "~3.9.0",
+    "@ember/optional-features": "^0.7.0",
+    "broccoli-asset-rev": "^3.0.0",
+    "ember-cli": "~3.10.1",
     "ember-cli-dependency-checker": "^3.1.0",
-    "ember-cli-eslint": "^4.2.3",
     "ember-cli-htmlbars": "^2.0.3",
-    "ember-cli-htmlbars-inline-precompile": "^1.0.3",
+    "ember-cli-htmlbars-inline-precompile": "^2.1.0",
     "ember-cli-inject-live-reload": "^1.8.2",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-template-lint": "^1.0.0-beta.1",
     "ember-cli-uglify": "^2.1.0",
-    "ember-cli-update": "^0.34.4",
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-export-application-global": "^2.0.0",
-    "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": "^4.4.1",
     "ember-resolver": "^5.0.1",
-    "ember-source": "~3.9.0",
+    "ember-source": "~3.10.0",
     "ember-source-channel-url": "^1.1.0",
     "ember-try": "^1.0.0",
     "ember-welcome-page": "^3.0.0",
+    "eslint": "5.16.0",
     "eslint-config-prettier": "^2.9.0",
-    "eslint-plugin-ember": "^5.2.0",
-    "eslint-plugin-node": "^7.0.1",
+    "eslint-plugin-ember": "^6.2.0",
+    "eslint-plugin-node": "^9.0.1",
     "eslint-plugin-prettier": "^2.4.0",
     "loader.js": "^4.7.0",
     "prettier": "^1.9.2",
-    "qunit-dom": "^0.8.0"
+    "qunit-dom": "^0.8.4"
   },
   "engines": {
-    "node": "6.* || 8.* || >= 10.*"
+    "node": "8.* || >= 10.*"
   },
   "ember-addon": {
     "configPath": "tests/dummy/config"