🐛 Fix tests for CI

[tiangolo]

🐛 Fix tests for CI:

• Separate linting from tests, run only on 3.7+
• Fix setup for testing git tags

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@cd0e6df). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main       #1   +/-   ##
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  Coverage        ?   99.37%           
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  Files           ?        2           
  Lines           ?      161           
  Branches        ?        0           
=======================================
  Hits            ?      160           
  Misses          ?        1           
  Partials        ?        0           

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