[build] Fix yarn warning about passing options with `--` on yarn test:prod

Fix - by not passing options via `--`

`yarn test:prod`

```
$ tslint  --project tsconfig.json -t codeFrame 'src/**/*.ts' 'test/**/*.ts'
warning From Yarn 1.0 onwards, scripts don't require "--" for options to be forwarded. In a future version, any explicit "--" will be forwarded as-is to the scripts.
```