Optimize Socket Reconnect

[dsrees]

• Use a more aggressive reconnect algorithm
• decouple socket reconnect algorithm with channel rejoin, socket side. Channel changes next
• Fix socket never reconnecting after a heartbeat times out
• Updated WebSocketTransport to call onClose after an onError event

[codecov-io]

Codecov Report

Merging #61 into master will increase coverage by 0.01%.
The diff coverage is 82.6%.

@@             Coverage Diff              @@
##             master      #61      +/-   ##
============================================
+ Coverage     91.22%   91.23%   +0.01%     
- Complexity      174      179       +5     
============================================
  Files             9        9              
  Lines           513      525      +12     
  Branches         66       69       +3     
============================================
+ Hits            468      479      +11     
- Misses           13       14       +1     
  Partials         32       32

Impacted Files	Coverage Δ	Complexity Δ
src/main/kotlin/org/phoenixframework/Transport.kt	83.33% <100%> (-0.67%)	0 <0> (ø)
src/main/kotlin/org/phoenixframework/Defaults.kt	90.9% <80%> (-9.1%)	5 <2> (+2)
src/main/kotlin/org/phoenixframework/Socket.kt	91.97% <82.35%> (-0.19%)	70 <5> (+2)
src/main/kotlin/org/phoenixframework/Push.kt	84% <0%> (+2%)	25% <0%> (+1%)	⬆️

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