prepare release 4.5.5

[phil-davis]

IMO these can all be called "patches" or "bugfixes". So just incrementing the patch number is fine.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.65%. Comparing base (b7f45de) to head (f7d900f).
Report is 1 commits behind head on 4.5.

❗ Current head f7d900f differs from pull request most recent head ccbf597

Please upload reports for the commit ccbf597 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff            @@
##                4.5     #661   +/-   ##
=========================================
  Coverage     98.65%   98.65%           
  Complexity     1907     1907           
=========================================
  Files            71       71           
  Lines          5294     5294           
=========================================
  Hits           5223     5223           
  Misses           71       71           

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