Test fails on node v8.5.0

```
42 specs, 39 failures
Finished in 0 seconds
[18:13:57] 'jasmine' errored after 629 ms
[18:13:57] Error in plugin 'gulp-jasmine'
Message:
    Tests failed
npm ERR! Test failed.  See above for more details
```

Thanks, @ShkarupaNick for the report