Update ember-cli to v2.12.3

.npmignore

@@ -8,7 +8,7 @@
 .editorconfig
 .ember-cli
 .gitignore
-.jshintrc
+.eslintrc.js
 .watchmanconfig
 .travis.yml
 bower.json

ember-cli-build.js

@@ -1,7 +1,7 @@
 'use strict';
 
-/* jshint node:true*/
-/* global require, module */
+/* eslint-env node */
+
 const EmberAddon = require('ember-cli/lib/broccoli/ember-addon');
 
 module.exports = function(defaults) {

package.json

@@ -28,11 +28,11 @@
     "@glimmer/syntax": "^0.29.1",
     "broccoli-asset-rev": "^2.4.5",
     "ember-ajax": "^2.4.1",
-    "ember-cli": "~2.11.0",
+    "ember-cli": "~2.12.3",
     "ember-cli-babel": "^6.11.0",
     "ember-cli-chai": "0.3.2",
     "ember-cli-dependency-checker": "^1.3.0",
-    "ember-cli-eslint": "^3.0.2",
+    "ember-cli-eslint": "^3.0.0",
     "ember-cli-htmlbars": "^1.1.1",
     "ember-cli-htmlbars-inline-precompile": "^1.0.2",
     "ember-cli-inject-live-reload": "^1.4.1",
@@ -44,11 +44,11 @@
     "ember-export-application-global": "^1.0.5",
     "ember-load-initializers": "^0.6.0",
     "ember-resolver": "^2.0.3",
-    "ember-source": "~2.11.0",
+    "ember-source": "~2.12.0",
     "ember-welcome-page": "^2.0.2",
     "eslint-config-simplabs": "0.2.2",
     "jest": "^21.2.0",
-    "loader.js": "^4.1.0"
+    "loader.js": "^4.2.3"
   },
   "engines": {
     "node": ">= 4"