Update the python package

[klaasnicolaas]

This PR will do:

• Remove the init from the main dataclass
• Decode always the request response
• Add extra tests for full 100% codecov coverage

[codecov]

Codecov Report

Merging #90 (719aa7a) into master (9149c01) will increase coverage by 5.05%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           master       #90      +/-   ##
===========================================
+ Coverage   94.94%   100.00%   +5.05%     
===========================================
  Files           4         4              
  Lines         178       179       +1     
  Branches       29        34       +5     
===========================================
+ Hits          169       179      +10     
+ Misses          7         0       -7     
+ Partials        2         0       -2     

Impacted Files	Coverage Δ
omnikinverter/omnikinverter.py	100.00% <100.00%> (+13.04%)	⬆️

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