Remove the Coveralls from the travis configuration

[cinar]

Describe Request

Remove the Coveralls from the travis configuration.
Fixed #92

Change Type

New feature.

[codecov-commenter]

Codecov Report

Merging #93 (3100a98) into master (218d475) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #93   +/-   ##
=======================================
  Coverage   56.00%   56.00%           
=======================================
  Files          13       13           
  Lines        1200     1200           
=======================================
  Hits          672      672           
  Misses        520      520           
  Partials        8        8           

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