text: Title: Set the version on pyproject.toml automatically
  Body: ## Description
  
  Set [the version on pyproject.toml file](https://github.com/scanapi/scanapi/blob/master/pyproject.toml#L3) automatically. We want to avoid to manually [bump the version](https://github.com/scanapi/scanapi/pull/212/files#diff-522adf759addbd3b193c74ca85243f7dR3) for each release PR.
  
  Maybe this would be a good candidate: https://github.com/mtkennerly/poetry-dynamic-versioning. It needs more investigation