Trying to fix travis

.travis.yml

@@ -1,14 +1,18 @@
 language: ruby
 cache: bundler
 
+notifications:
+  email: false
+
 env:
+  matrix:
+    - TRAVIS_NODE_VERSION="4"
   global:
     - LOCAL_DOMAIN=cb6e6126.ngrok.io
     - LOCAL_HTTPS=true
     - RAILS_ENV=test
     - NEO4J_HOST=localhost
     - NEO4J_PORT=7575
-    - TRAVIS_NODE_VERSION="4"
 
 addons:
   postgresql: 9.4
@@ -22,7 +26,8 @@ services:
 bundler_args: --without development production --retry=3 --jobs=3
 
 install:
-  - rm -rf ~/.nvm && git clone https://github.com/creationix/nvm.git ~/.nvm && (cd ~/.nvm && git checkout `git describe --abbrev=0 --tags --match "v[0-9]*" origin`) && source ~/.nvm/nvm.sh && nvm install $TRAVIS_NODE_VERSION
+  - rm -rf ~/.nvm && git clone https://github.com/creationix/nvm.git ~/.nvm && (cd ~/.nvm && git checkout `git describe --abbrev=0 --tags --match "v[0-9]*" origin`) && source ~/.nvm/nvm.sh
+  - nvm install $TRAVIS_NODE_VERSION
   - npm install -g npm@3
   - npm install -g yarn
   - bundle install