Upgrade dependencies & drop Python 3.6 support

[greyli]

• Upgrade all the dev dependencies to the latest version
• Drop Python 3.6 support
• Test against Python 3.10 and Python 3.11
• Bump Codecov action version to v3

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (2e4a62c) 63.10% compared to head (89783a6) 63.10%.
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #48   +/-   ##
=======================================
  Coverage   63.10%   63.10%           
=======================================
  Files           9        9           
  Lines         580      580           
=======================================
  Hits          366      366           
  Misses        214      214           

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