v0.4.1

What's Changed

• Review distance metrics and added squared distance as measure by @annahedstroem in #264
• Update requirements_test.txt by @annahedstroem in #266
• Add py.typed by @aaarrti in #269
• Toml + Tox Migration by @aaarrti in #270
• update README.md by @aaarrti in #278

Full Changelog: v0.4.0...v0.4.1