### Fixed
- Possible recursion issue with program transformer
- Older TS versions, tsc wasn't passing diagnostics array

### Rebuilt tests
- Rebuilt all tests in Jest.
- Using virtual filesystem (much faster!)
- Tests multiple TS versions
- Covers much more

### Added
- Added 'library' to TspExtras

### Code
- Switched from mocha to Jest
- Switched from npm to Yarn
- Switched Travis to Github actions
- Reorganized code