Tests

Improved Integrators #462

Job	Run time
test (ubuntu-latest, 3.10, jax)	8m 9s
lint	1m 26s
test (ubuntu-latest, 3.10, tensorflow)	21m 25s
test (ubuntu-latest, 3.10, torch)	11m 9s
test (ubuntu-latest, 3.11, jax)	8m 28s
test (ubuntu-latest, 3.11, tensorflow)	23m 4s
test (ubuntu-latest, 3.11, torch)	11m 45s
test (windows-latest, 3.10, jax)	15m 46s
test (windows-latest, 3.10, tensorflow)	32m 41s
test (windows-latest, 3.10, torch)	21m 41s
test (windows-latest, 3.11, jax)	17m 18s
test (windows-latest, 3.11, tensorflow)	32m 33s
test (windows-latest, 3.11, torch)	21m 57s
	3h 47m 22s

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