Robotframework-camunda

New keyword added: `Get Process Instance Variable`: https://docs.camunda.org/manual/7.14/reference/rest/process-instance/variables/get-variable/

Ugly to make this its own release, but links for documentation pointed to wrong URLs and are static on pypi.org

New keyword for [version endpoint](https://docs.camunda.org/manual/7.14/reference/rest/version/)

Useful for checking if camunda url is correct.

No changes, except moving from GitLab to GitHub