[BUG] isort broken on github action

[Tom]

Describe the bug
isort in pre-commit (.pre-commit-config.yaml) seems broken, not locally but it does break in Github actions. See #112

Evidence
https://github.com/plugwise/python-plugwise/runs/4650984392?check_suite_focus=true

Expected behavior
"It used to work" and "works on my laptop" as per usual, seems only github is (suddenly) acting up

** Screenshots **

Additional context
Removed isort from the verify github action and from .pre-commit-config.yaml