remove dangling commas from function params to support node v6.14

[eleith]

fixes #24 by removing two dangling commas on functional arguments

[codecov]

Codecov Report

Merging #25 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #25   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          44     44           
  Branches       13     13           
=====================================
  Hits           44     44

Impacted Files	Coverage Δ
index.js	100% <ø> (ø)	⬆️

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[cyrilwanner]

Strange, I would have expected travis to fail as I'm also running tests on node 6 there. I guess I have to check the test & travis setup again..

Thank you very much for pointing out this issue and for fixing it @eleith! 🎉