Update to LiveScript 1.3.0 (package.json)

```bash
$ npm test

> gulp-livescript@1.3.0 test *****
> mocha -R spec --compilers ls:LiveScript --require should



  gulp-livescript
    ✓ should compile livescript file to javascript 
    ✓ should compile livescript with bare option to javascript 
    ✓ should compile livescript json files 
    ✓ should emit error when livescript compilation fails 
    ✓ should emit error with streaming files 


  5 passing (43ms)
```