fix coveralls flag-name

[vtjnash]

No description provided.

[codecov]

Codecov Report

Merging #32 (46f6967) into master (961e882) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #32   +/-   ##
=======================================
  Coverage   92.49%   92.49%           
=======================================
  Files           1        1           
  Lines         293      293           
=======================================
  Hits          271      271           
  Misses         22       22           

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[coveralls]

Coverage remained the same at 91.756% when pulling 46f6967 on jn/coveralls-flag-name into 961e882 on master.