Update ember-cli and dependencies

    - Adopt yarn
    - use eslint directly
    - remove lots of dependencies required only for building browser code
    - Embrace being a node-only ember-cli addon
    - remove lots of boilerplate ember-cli addon files and directories

Author: lukemelia

.bowerrc

@@ -0,0 +1,13 @@
+module.exports = {
+  root: true,
+  parserOptions: {
+    ecmaVersion: 6,
+    sourceType: 'module'
+  },
+  extends: 'eslint:recommended',
+  env: {
+    browser: true
+  },
+  rules: {
+  }
+};

.eslintrc.js

@@ -1,22 +1,19 @@
 ---
 language: node_js
 node_js:
-  - "0.12"
+  - "6"
 
 sudo: false
 
 cache:
-  directories:
-    - node_modules
+  yarn: true
 
 before_install:
-  - "npm config set spin false"
-  - "npm install -g npm@^2"
+  - curl -o- -L https://yarnpkg.com/install.sh | bash
+  - export PATH=$HOME/.yarn/bin:$PATH
 
 install:
-  - npm install -g bower
-  - npm install
-  - bower install
+  - yarn install --no-lockfile
 
 script:
-  - npm test
+  - yarn test

.jshintrc

@@ -103,7 +103,11 @@ The following properties are expected to be present on the deployment `context`
 
 ## Running Tests
 
-- `npm test`
+* `yarn test`
+
+## Why `ember build` and `ember test` don't work
+
+Since this is a node-only ember-cli addon, this package does not include many files and dependencies which are part of ember-cli's typical `ember build` and `ember test` processes.
 
 [1]: http://ember-cli-deploy.github.io/ember-cli-deploy/plugins/ "Plugin Documentation"
 [2]: https://github.com/zapnito/ember-cli-deploy-build "ember-cli-deploy-build"

.travis.yml

@@ -1,10 +1,15 @@
 machine:
   node:
-   version: 0.12.0
+   version: 4
+  environment:
+    PATH: "${PATH}:${HOME}/${CIRCLE_PROJECT_REPONAME}/node_modules/.bin"
 
 dependencies:
-  pre:
-    - npm install -g bower
   override:
-    - npm i
-    - bower i
+    - yarn
+  cache_directories:
+    - ~/.cache/yarn
+
+test:
+  override:
+    - yarn test