tests

Planar projection (perspective/orthographic combination projection) #250

Job	Run time
Test (windows-latest, stable)	1m 29s
Benchmark (ubuntu-latest, nightly, rand,serde,mint)	2m 12s
Test (windows-latest, stable, serde,mint)	54s
Test (windows-latest, nightly)	1m 8s
Test (windows-latest, nightly, serde,mint)	1m 5s
Test (ubuntu-latest, stable)	20s
Test (ubuntu-latest, stable, serde,mint)	24s
Test (ubuntu-latest, nightly)	21s
Test (ubuntu-latest, nightly, serde,mint)	23s
Test (macos-latest, stable)	16s
Test (macos-latest, stable, serde,mint)	19s
Test (macos-latest, nightly)	22s
Test (macos-latest, nightly, serde,mint)	25s
	9m 38s

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