Version option for CLI

[fabianegli]

This PR makes the version available as part of the imported package and adds the command line option --version to the parse_sdrf command.

$ parse_sdrf --version
sdrf_pipelines 0.0.21

Closes #122

Links

• https://packaging.python.org/en/latest/guides/single-sourcing-package-version/
• https://click.palletsprojects.com/en/8.1.x/api/#click.version_option