Remove python 3.6 support, add 3.10

[fronzbot]

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[codecov]

Codecov Report

Merging #554 (cb404d1) into dev (78c4b77) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##              dev     #554   +/-   ##
=======================================
  Coverage   86.33%   86.33%           
=======================================
  Files           8        8           
  Lines        1054     1054           
=======================================
  Hits          910      910           
  Misses        144      144           

Flag	Coverage Δ
unittests	86.33% <100.00%> (ø)

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Impacted Files	Coverage Δ
blinkpy/helpers/constants.py	100.00% <100.00%> (ø)

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