Setup GitHub Actions CI and Code Climate Test Coverage

[grahamhency]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
  Tests for the changes have been added
  Docs have been added or updated

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Style Update (CSS)
• Other... Please describe:

What is the current behavior?

Uses Travis for CI

What is the new behavior?

• Transitions this repo to use GitHub Actions for continuous integration (CI)
• Introduces test coverage for Code Climate
• Introduces GitHub Actions for continuous deployment (CD)

Does this PR introduce a breaking change?

• Yes
• No