Fix Travis setup

[DanielMSchmidt]

Hi there,

Thanks again for this great lib. I was just curious if you would mind fixing your travis setup? A simple travis.yml with language: node_js should work as it automatically runs npm install and npm test.

Have a nice day!

[bdougie]

@DanielMSchmidt I am not familiar with Travis and have not used it for a project, but just by took a look at the react-native travis.yml.

Is what your asking for something that looks like this?

//.travis.yml

language: node_js
node_js:
  - "5"
  - "5.1"
  - "4"
  - "4.2"
  - "4.1"

[DanielMSchmidt]

@bdougie Yeah, that would be okay

[RealOrangeOne]

Issue was fixed in #29