(ci)Report Test Coverage to Code Climate

[elfrank]

Brief Description

Update Travis CI configuration to report unit test coverage to Code Climate.

Pull Request Guidelines

• [x] I have added pull requests labels which describe my contribution.
• [x] All existing tests passed.
  • [ ] I have added tests to cover my changes, of which pass.
• [x] I have compared the render output of my branch to master.
• [x] My code has passed the ESLint configuration for this project.
• [x] My change requires modifications to the documentation.
  • [ ] I have updated the documentation accordingly.