Change OpenZeppelin coverage report link

[frangio]

We've migrated to Codecov. (It's very good!)

[codecov-io]

Codecov Report

Merging #419 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #419   +/-   ##
=======================================
  Coverage   91.66%   91.66%           
=======================================
  Files           6        6           
  Lines         372      372           
  Branches       79       79           
=======================================
  Hits          341      341           
  Misses         31       31

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[cgewecke]

@frangio Thanks so much :)

I keep forgetting to mention this but there is one weird thing about codecov X solidity, namely: branch coverage seems to be missing.

I think it's because they use their own JS parsing of target files and it doesn't work for TypeScript, CoffeeScript (or Solidity).

Very hard to tell how meaningful a difference this is at Zeppelin since your coverage is basically perfect....You can always get this info from the locally produced html coverage report in any case.

[frangio]

Oh that's interesting... Thanks for the heads up.