0.3.1: Support `--root-only` and `--only` poetry options

What's Changed

• add only_root and only options to _prepare_export_args by @RichieCahill in #17
• added pytest-cov by @RichieCahill in #16

New Contributors

• @RichieCahill made their first contribution in #17

Full Changelog: 0.3.0...0.3.1