Merge branch 'release/0.2.1' into develop
Merge branch 'README' into develop
Merge branch 'release/0.2.2' into develop
feat(hljsService): configuration

- Supports configuration with `hljsServiceProvider.setOptions()` in config
  state

Closes #12
Bump version 0.2.3
Update README.md
Merge branch 'release/0.2.3'