Optimize event emit and command management

[atrovato]

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• If your changes affects code, did your write the tests?
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Description of change

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[codecov]

Codecov Report

Merging #97 (855a64d) into master (bd9c38b) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #97      +/-   ##
==========================================
+ Coverage   97.80%   97.82%   +0.02%     
==========================================
  Files         705      705              
  Lines       10872    10892      +20     
==========================================
+ Hits        10633    10655      +22     
+ Misses        239      237       -2     

Impacted Files	Coverage Δ
server/lib/device/device.saveStringState.js	100.00% <ø> (ø)
server/services/rtsp-camera/lib/startStreaming.js	100.00% <ø> (ø)
server/services/zigbee2mqtt/exposes/numericType.js	100.00% <ø> (ø)
server/utils/constants.js	100.00% <ø> (ø)
server/lib/device/device.newStateEvent.js	92.85% <100.00%> (+11.03%)	⬆️
server/lib/room/room.getBySelector.js	100.00% <100.00%> (ø)
...e-actions/lib/smarthome/googleActions.onExecute.js	100.00% <100.00%> (+2.22%)	⬆️
...tions/lib/traits/googleActions.brightness.trait.js	100.00% <100.00%> (ø)
...ons/lib/traits/googleActions.colorSetting.trait.js	100.00% <100.00%> (ø)
...le-actions/lib/traits/googleActions.onOff.trait.js	100.00% <100.00%> (ø)
... and 4 more