Add tests for BatteryReceiverPlugin

[freundTech]

No description provided.

[codecov-commenter]

Codecov Report

Merging #9 (d0fa5b9) into main (e0f979b) will increase coverage by 30.35%.
The diff coverage is 34.48%.

@@            Coverage Diff             @@
##            main       #9       +/-   ##
==========================================
+ Coverage   7.40%   37.76%   +30.35%     
==========================================
  Files         15       15               
  Lines       1094     1099        +5     
==========================================
+ Hits          81      415      +334     
+ Misses      1013      684      -329     

Impacted Files	Coverage Δ
pykdeconnect/protocols.py	32.14% <0.00%> (+32.14%)	⬆️
pykdeconnect/devices.py	41.66% <19.04%> (+41.66%)	⬆️
pykdeconnect/payloads.py	93.10% <100.00%> (+93.10%)	⬆️
pykdeconnect/plugins/battery.py	97.80% <100.00%> (+97.80%)	⬆️
pykdeconnect/plugin_registry.py	33.78% <0.00%> (+33.78%)	⬆️
pykdeconnect/helpers.py	59.52% <0.00%> (+59.52%)	⬆️
pykdeconnect/plugin.py	80.00% <0.00%> (+80.00%)	⬆️
pykdeconnect/exceptions.py	80.00% <0.00%> (+80.00%)	⬆️
... and 3 more

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