set loop to None in Python 3.10

[basnijholt]

Description

Please include a summary of the change and which (if so) issue is fixed.

Fixes #344

Checklist

• Fixed style issues using pre-commit run --all (first install using pip install pre-commit)
• pytest passed

Type of change

Check relevant option(s).

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• (Code) style fix or documentation update
• This change requires a documentation update

[codecov-commenter]

Codecov Report

Merging #348 (3247e21) into master (6bb5d28) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 3247e21 differs from pull request most recent head f4880d0. Consider uploading reports for the commit f4880d0 to get more accurate results

@@           Coverage Diff           @@
##           master     #348   +/-   ##
=======================================
  Coverage   80.81%   80.82%           
=======================================
  Files          38       38           
  Lines        5057     5059    +2     
  Branches      946      946           
=======================================
+ Hits         4087     4089    +2     
  Misses        828      828           
  Partials      142      142           

Impacted Files	Coverage Δ
adaptive/runner.py	70.31% <100.00%> (+0.21%)	⬆️

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