Bump fileset version

[lukyth]

The current fileset version use minimatch@2.0.10 which might cause a RegExp DoS issue.

Update fileset to the latest version fix this warning.

This will resolve #6

[yahoocla]

Thank you for submitting this pull request, however I do not see a valid CLA on file for you. Before we can merge this request please visit https://yahoocla.herokuapp.com/ and agree to the terms. Thanks! 😄

[yahoocla]

CLA is valid!

[lukyth]

I've tested it and found out that the test was failed even with the old fileset version. Probably need to fix the test first.

[jmfrancois]

Yes please @lukyth fix the tests first

[montogeek]

Tests are fixed on #9

Merge #9 first, then this one? :)

[bcoe]

@lukyth mind rebasing with master? sounds like tests should start passing after?

[lukyth]

@bcoe Done! 😄

[SimenB]

@bcoe Can this get merged and released? Really annoying that deprecation warning from Jest on almost every single yarn command

[bcoe]

@SimenB 👍 bumping to the top of my list.

[bcoe]

@lukyth thanks a ton for the contribution, I'll have a candidate release out soon and will flag the Jest folks. FYI, here's why those tests broke:

7659ef9

node_modules is excluded by default in fileset now, for the time being I removed this behavior since we already do this.

[bcoe]

@lukyth would love the extra set of eyes testing, you should now be able to run:

npm cache clear; npm i istanbul-api@next to experiment with a candidate release that has the upgraded fileset dependency.