Add files to package.json.

[wtgtybhertgeghgtwtg]

No description provided.

[SpaceK33z]

I'd rather have a whitelist with the files field, like we do in most of the webpack packages.

[wtgtybhertgeghgtwtg]

I just used the .npmignore since it was there. I will update the PR to use files.

[codecov-io]

Current coverage is 98.35% (diff: 100%)

Merging #388 into master will not change coverage

@@             master       #388   diff @@
==========================================
  Files             9          9          
  Lines           304        304          
  Methods          41         41          
  Messages          0          0          
  Branches         67         67          
==========================================
  Hits            299        299          
  Misses            5          5          
  Partials          0          0          

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[wtgtybhertgeghgtwtg]

Now usings files in package.json.

[SpaceK33z]

Thanks!

[wtgtybhertgeghgtwtg]

Thank you for merging.