use version number instead of release in .travis.yml

[tkelman]

release will change over time, but your REQUIRE file says this package supports julia 0.5 so it should continue to be tested

[coveralls]

Coverage remained the same at 93.636% when pulling 6e1f036 on tkelman:travisver into 9a0a787 on antimon2:master.

[codecov-io]

Codecov Report

Merging #3 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #3   +/-   ##
=======================================
  Coverage   93.63%   93.63%           
=======================================
  Files          11       11           
  Lines         220      220           
=======================================
  Hits          206      206           
  Misses         14       14

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[antimon2]

@tkelman Thanks for the announcement.