LiveQuery: Always receive and pass connection errors

[cbaker6]

Ensure that LiveQuery delegate always receives connection errors. Previously, an error that occurs after a resumeTask may not be passed to the delegate.

• Fix reconnections when the LiveQuery server is restarted or disconnected
• Add test cases
• Add playground example
• Add change log entry

[codecov]

Codecov Report

Merging #211 (c712a0f) into main (edbe3c6) will increase coverage by 0.14%.
The diff coverage is 75.38%.

@@            Coverage Diff             @@
##             main     #211      +/-   ##
==========================================
+ Coverage   82.84%   82.99%   +0.14%     
==========================================
  Files          76       76              
  Lines        7250     7290      +40     
==========================================
+ Hits         6006     6050      +44     
+ Misses       1244     1240       -4     

Impacted Files	Coverage Δ
...t/LiveQuery/Protocols/ParseLiveQueryDelegate.swift	16.66% <ø> (ø)
Sources/ParseSwift/LiveQuery/ParseLiveQuery.swift	74.38% <71.92%> (+2.01%)	⬆️
Sources/ParseSwift/LiveQuery/LiveQuerySocket.swift	60.25% <100.00%> (+15.97%)	⬆️
Sources/ParseSwift/Coding/AnyEncodable.swift	61.18% <0.00%> (-0.66%)	⬇️
Sources/ParseSwift/Coding/ParseEncoder.swift	75.99% <0.00%> (-0.31%)	⬇️
Sources/ParseSwift/Types/Query.swift	94.95% <0.00%> (-0.16%)	⬇️
Sources/ParseSwift/Objects/ParseUser.swift	82.74% <0.00%> (-0.15%)	⬇️

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