Fixing some tslint errors

[bricka]

There were three tslint errors that were causing Travis CI checks to fail.

[codecov-io]

Codecov Report

Merging #127 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #127   +/-   ##
=======================================
  Coverage   94.93%   94.93%           
=======================================
  Files          34       34           
  Lines         612      612           
  Branches       71       71           
=======================================
  Hits          581      581           
  Misses         22       22           
  Partials        9        9

Impacted Files	Coverage Δ
src/matcher/type/AnyOfClassMatcher.ts	100% <100%> (ø)	⬆️
src/ts-mockito.ts	96.72% <100%> (ø)	⬆️
src/Mock.ts	95.86% <100%> (ø)	⬆️

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