Fix handling of command timeouts

[andrewsayre]

Description:

Fixes inability to recover when a command response is received after the timeout period and the original caller has timed out and is no longer waiting for the response. Also improves handling/tracking of incoming responses so that if unexpected responses are received, they are logged and ignored.

Related issue (if applicable): fixes #98

Checklist:

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• Tests have been added/updated. No exclusions in .coveragerc permitted.
• README.MD updated (if necessary)

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (e04cd54) to head (7046b79).

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Additional details and impacted files

@@            Coverage Diff            @@
##               dev      #100   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           22        22           
  Lines         1974      1978    +4     
=========================================
+ Hits          1974      1978    +4     

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