Use jupyter-fs<0.4.0 in tests #25

Job	Run time
pre-commit / pre-commit	27s
pre-commit / lint-extension	1m 35s
codeql / codeql	3m 37s
test-pip / test-pip (3.8, ~=2.0, true)	9m 42s
test-pip / test-pip (3.9, ~=2.0, true)	10m 20s
test-pip / test-pip (3.10, ~=2.0, true)	11m 35s
test-conda / test-conda (ubuntu-latest, 3.9)	13m 27s
test-pip / test-pip (3.11, ~=2.0, true)	9m 46s
test-conda / test-conda (macos-latest, 3.9)	15m 51s
test-pip / test-pip (3.12-dev, true)	9m 58s
test-conda / test-conda (windows-latest, 3.9)	15m 7s
test-pip / test-pip (3.13-dev, true)	4m 39s
test-pip / test-pip (3.x)	10m 12s
test-pip / test-pip (3.x, ~=3.0)	12m 52s
test-pip / test-pip (3.11, ~=4.0, true)	2m 40s
test-pip / test-pip (3.x, false)	12m 37s
test-pip / test-pip (3.x, true, true)	10m 27s
build / build	3m 21s
pass	2s
	2h 38m 15s

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