Ensure that subclasses override class attributes

[fredrike]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 85.71429% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.00%. Comparing base (c406595) to head (9c32eb0).

Files with missing lines	Patch %	Lines
pydaikin/daikin_base.py	80.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #105      +/-   ##
==========================================
- Coverage   84.04%   84.00%   -0.04%     
==========================================
  Files          12       12              
  Lines        1178     1194      +16     
==========================================
+ Hits          990     1003      +13     
- Misses        188      191       +3     

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