Merge pull request #59 from cutls/WIP-(before-CI)

Wip (before ci)

.travis.yml

@@ -1,7 +1,15 @@
-os: osx
-language: node_js
-node_js:
-- '10.15.2'
+language: objective-c
+cache:
+  directories:
+    - node_modules
+env:
+  - NODE_VERSION="10.15.2"
+before_install:
+  - git clone https://github.com/creationix/nvm.git /tmp/.nvm
+  - source /tmp/.nvm/nvm.sh
+  - nvm install $NODE_VERSION
+  - nvm use --delete-prefix $NODE_VERSION
+  - node --version
 script: node -v
 before_deploy:
   - npm install electron-builder -g