Tests

use linalg.expm #290

Job	Run time
run-tests (matrix, base, ubuntu-latest, 3.9, false)	1m 47s
run-tests (matrix, base, ubuntu-latest, 3.10, false)	2m 6s
run-tests (matrix, base, ubuntu-latest, 3.11, false)	2m 11s
run-tests (matrix, base, ubuntu-latest, 3.12, false)	2m 8s
run-tests (tensor, base, ubuntu-latest, 3.9, false)	8m 25s
run-tests (tensor, base, ubuntu-latest, 3.10, false)	9m 46s
run-tests (tensor, base, ubuntu-latest, 3.11, false)	8m 31s
run-tests (tensor, base, ubuntu-latest, 3.12, false)	9m 49s
run-tests (macos-latest, matrix, base, 3.11, true)	1m 32s
run-tests (macos-latest, tensor, base, 3.11, false)	5m 17s
run-tests (windows-latest, matrix, openblas, 3.11, false, True)	4m 18s
run-tests (windows-latest, tensor, openblas, 3.11, false, True)	12m 57s
run-tests (torch, tensor, ubuntu-latest, 3.11, false)	10m 17s
run-tests (jax, tensor, ubuntu-latest, 3.11, false)	9m 9s
run-tests (tensorflow, tensor, ubuntu-latest, 3.11, false)	10m 14s
run-tests (slepc, matrix, ubuntu-latest, 3.11, false)	2m 3s
	1h 40m 30s

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