FIX: fix `is_integer()` bug for QRules v0.10.4 #719

Job	Run time
pytest / Determine job matrix	7s
style / Determine skipped pre-commit hooks	6s
doc / nb / Execute and build documentation	57s
doc / linkcheck / Check external links	38s
style / Run local pre-commit hooks	1m 3s
pytest / Run unit tests (3.10, ubuntu-24.04)	1m 28s
pytest / Run unit tests (3.11, ubuntu-24.04)	1m 20s
pytest / Run unit tests (3.13, ubuntu-24.04)	1m 19s
pytest / Run unit tests (3.9, ubuntu-24.04)	1m 25s
pytest / Run unit tests (3.12, ubuntu-24.04, ampform)	3m 39s
pytest / Run unit tests (3.9, macos-14)	1m 18s
doc / Upload to GitHub Pages	0s
style / Push changes	0s
	13m 20s

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