v0.15.6

Features

• Added cryptocurrency examples by @GenusGeoff in #621
• feature(websocket): Add websocket client by @Mohamedemad4 in #508
• Minor documentation updates

Developer changes

• Add CodeQL workflow for GitHub code scanning by @lgtm-com in #785
• feat: apply latest black python formatting by @hydrosquall in #842
• build: replace python 3.6 testing with 3.9 by @hydrosquall in #841
• build: remove pytest-runner (fixes #749) by @hydrosquall in #845
• dev: update tested and recommended python versions by @hydrosquall in #944
• chore(build): apply black formatting + CI step to main codebase by @hydrosquall in #663
• fix: remove timezone assertion from unit tests + fix codecov upload step by @hydrosquall in #856
• Dozens of pyup bot updates
• Publish using trusted publisher workflow instead of PyPI credentials (details)

New Contributors

• @GenusGeoff made their first contribution in #621
• @Mohamedemad4 made their first contribution in #508

Full Changelog: v0.14.0...v0.15.6