Add yeelink.light.color7 for yeelight

[rytilahti]

Fixes #1425

[codecov-commenter]

Codecov Report

Merging #1426 (c9573f2) into master (a1def97) will not change coverage.
The diff coverage is n/a.

❗ Current head c9573f2 differs from pull request most recent head 038b97e. Consider uploading reports for the commit 038b97e to get more accurate results

@@           Coverage Diff           @@
##           master    #1426   +/-   ##
=======================================
  Coverage   84.31%   84.31%           
=======================================
  Files         135      135           
  Lines       13389    13389           
  Branches     1493     1493           
=======================================
  Hits        11289    11289           
  Misses       1883     1883           
  Partials      217      217           

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