Add Mat2::from_mat3_minor and Mat3::from_mat4_minor methods (#543) #1396

Job	Run time
Lint	2m 10s
Test (ubuntu-latest, stable)	2m 54s
Check MSRV (ubuntu-latest, 1.68.2)	2m 13s
Test (ubuntu-latest, beta)	2m 55s
Check MSRV (macos-latest, 1.68.2)	2m 7s
Test (ubuntu-latest, nightly)	2m 38s
Test portable simd (ubuntu-latest, nightly)	41s
Check MSRV (windows-latest, 1.68.2)	2m 43s
Test (macos-latest, stable)	2m 9s
Test portable simd (macos-latest, nightly)	41s
Test (macos-latest, beta)	2m 29s
Test portable simd (windows-latest, nightly)	1m 13s
Test wasm (stable, ubuntu-latest)	4m 24s
Test (macos-latest, nightly)	3m 0s
Test (windows-latest, stable)	4m 36s
Test (windows-latest, beta)	4m 51s
Test (windows-latest, nightly)	4m 19s
	46m 3s

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