Updating PyQt5 to 5.15.11

[ksbeattie]

Fixes/Addresses:

I just noticed that PyQt5 has a newer release on PyPi than we are using.

Summary/Motivation:

Testing this to see if it still works, or even solves some of our issues (like #pysqt

Changes proposed in this PR:

• PyQt5 from 5.15.10 to 5.15.11

Legal Acknowledgement

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1. I agree my contributions are submitted under the copyright and license terms described in the LICENSE.md file at the top level of this directory.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 39.05%. Comparing base (bb11943) to head (588b708).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1280   +/-   ##
=======================================
  Coverage   39.05%   39.05%           
=======================================
  Files         165      165           
  Lines       37745    37745           
  Branches     5864     5864           
=======================================
  Hits        14740    14740           
  Misses      21879    21879           
  Partials     1126     1126           

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