pre-release 0.3.1

What's Changed

• Ref/add tests by @kaziamov in #8
• Tests/add crud tests by @kaziamov in #9
• Feat/update 2 by @kaziamov in #10
• Update README.md by @kaziamov in #11
• Config/add pypi config by @kaziamov in #12
• Fix config by @kaziamov in #13
• Feat/update 3 by @kaziamov in #14
• Update coverage.yml by @kaziamov in #15
• Feat/update 4 by @kaziamov in #16
• Feat/update 5 by @kaziamov in #17
• Release 0.2.0 by @kaziamov in #19
• Fix by @kaziamov in #20
• Fix bug and tests by @kaziamov in #21
• Update max-length settings and reformat code by @kaziamov in #22
• Update README by @kaziamov in #23
• Release/resolve conflicts by @kaziamov in #25
• Feature/add asyncpg compability by @kaziamov in #27

Full Changelog: public...pre-release