Prevent dev dependencies from breaking tests and examples #219

Job	Run time
Miri tests	3m 48s
Compile and test (ubuntu-latest, 1.60.0)	12m 20s
Compile and test (ubuntu-latest, stable)	5m 48s
Compile and test (ubuntu-latest, beta)	7m 20s
Compile and test (ubuntu-latest, nightly)	6m 49s
Compile and test (macos-latest, 1.60.0)	15m 34s
Compile and test (macos-latest, stable)	10m 34s
Compile and test (macos-latest, beta)	16m 32s
Compile and test (macos-latest, nightly)	9m 47s
Compile and test (windows-latest, 1.60.0)	10m 39s
Compile and test (windows-latest, stable)	5m 45s
Compile and test (windows-latest, beta)	7m 42s
Compile and test (windows-latest, nightly)	4m 30s
ci	1s
	1h 57m 9s

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