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Link to issue number:
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Description of this pull request
Updates pySerial to version 3.5 (November 2020). While not strictly necessary as far as I know, this ensures we are on the most recent version for our switch to Python 3.8
Testing strategy:
Should be tested with a serial braille display in production for several days to ensure there are no regressions. I have such a display.
Known issues with pull request:
None
Change log entry:
Code Review Checklist:
This checklist is a reminder of things commonly forgotten in a new PR.
Please do a self-review to check these items.
Reviewers will not approve the PR until these are met.