Added Kotlin to the test sourceSets.

[gordwilling]

Added ExportSpec using JUnit4 Addressed deprecation warnings in jacoco.gradle

The project should be set up now to write unit tests in Kotlin using JUnit 4. The main advantage is you can write test methods like this:

\@Test fun `using backquotes Kotlin lets your write names with spaces making for good test names`() { // test logic }

[codecov[bot]]

Codecov Report

Merging #289 into feature will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             feature    #289   +/-   ##
=========================================
  Coverage       91.6%   91.6%           
  Complexity      1058    1058           
=========================================
  Files            140     140           
  Lines           3227    3227           
  Branches         205     205           
=========================================
  Hits            2956    2956           
  Misses           179     179           
  Partials          92      92