3.1.0

[lczyk]

v3.1.0 (2022-11-30) Marcin Konowalczyk

• Moved some things to init
• Run black (this is actually most of the diff)
• Removed deprecated escape sequences from tests (basically backslashes \/, \d and \*, same as #38)
• Added typing for nicer editor hints and run mypy

[lczyk]

• Made non-interface functions private

[lczyk]

Tests passing on 3.7.15