Upgrade lastest websockets and Exceptions overhaul

[leszekhanusz]

• Using new asyncio implementation of the websockets dependency.
• Bump websockets to >=14.2
• Reduced some timers to make tests faster.
• Now the reconnecting session will reconnect as soon as it detects that the connection failed.
• Better log messages
• using TransportConnectionFailed instead of TransportClosed for exceptions which were due to the connection failing or closing. Using TransportClosed only for a closing of the transport initiated by the user.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (7fb869a) to head (cc3c3dd).
Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #543   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           38        38           
  Lines         2908      2856   -52     
=========================================
- Hits          2908      2856   -52     

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