Release v2.0.1

Fixed

• package discovery when project_name != project_slug.
• end-of-file hook.
• pypi release step only for open source projects.

Changed

• isort from ^5.8.0 to ^5.9.2.
• black from ^21.5b2 to ^21.7b0.
• watchdog from ^2.1.2 to ^2.1.3.
• xdoctest from ^0.15.4 to ^0.15.5.
• mypy from ^0.902 to ^0.910.
• sphinx from ^4.0.2 to ^4.1.1.
• invoke from ^1.5.0 to ^1.6.0.
• actions/upload-artifact from v2.2.0 to v2.2.4.
• actions/download-artifact from v2.0.5 to v2.0.10.
• codecov/codecov-action from v1.3.1 to v2.0.2.
• pypa/gh-action-pypi-publish for v1.4.1 to v1.4.2.