Change logic of inverter type detection

[wasilukm]

By default, all inverters are treated as HM series. Only inverters with serial numbers starting with "10" are treated as MI series.
This should cover more inverters without updating the library for every new inverter model.

Note: the knowledge of inverter type is needed for correct decoding pv_current.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.17%. Comparing base (3b0e4b0) to head (0f7fcad).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
- Coverage   98.21%   98.17%   -0.05%     
==========================================
  Files           4        4              
  Lines         168      164       -4     
  Branches       11        9       -2     
==========================================
- Hits          165      161       -4     
  Partials        3        3              

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