Update Ember CLI to 3.3 and Node to 10.7 (#1731)

I ran into many problems also updating Ember itself and
Ember Data, so I’ve split this off for partial completion.

.eslintignore

@@ -1,2 +1,18 @@
-node_modules/
-bower_components/
+# unconventional js
+/blueprints/*/files/
+/vendor/
+/public/
+/server/
+
+# compiled output
+/dist/
+/tmp/
+
+# dependencies
+/bower_components/
+
+# misc
+/coverage/
+
+# ember-try
+/.node_modules.ember-try/

.eslintrc.js

@@ -315,8 +315,9 @@ module.exports = {
     // node files
     {
       files: [
-        'testem.js',
         'ember-cli-build.js',
+        'testem.js',
+        'blueprints/*/index.js',
         'config/**/*.js',
         'lib/*/index.js'
       ],

.gitignore

@@ -1,29 +1,27 @@
 # See https://help.github.com/ignore-files/ for more about ignoring files.
 
 # compiled output
-/dist
-/tmp
+/dist/
+/tmp/
 
 # dependencies
-/node_modules
-/bower_components
+/bower_components/
+/node_modules/
 
 # misc
 /.sass-cache
 /connect.lock
-/coverage/*
+/coverage/
 /libpeerconnection.log
-npm-debug.log*
-testem.log
+/npm-debug.log*
+/testem.log
+/yarn-error.log
 .DS_Store
 
-# files generated by older build tools
-public/scripts
-
 # ember-try
-.node_modules.ember-try/
-bower.json.ember-try
-package.json.ember-try
+/.node_modules.ember-try/
+/bower.json.ember-try
+/package.json.ember-try
 
 # vs code JavaScript config file
 jsconfig.json

.travis.yml

@@ -1,6 +1,6 @@
 ---
 language: node_js
-node_js: 8.5
+node_js: 10.7
 
 env:
   global:
@@ -23,7 +23,7 @@ env:
 
 before_install:
   - npm config set spin false
-  - npm install -g npm@5
+  - npm install -g npm@6
   - npm --version
   - npm install -g greenkeeper-lockfile@1