Actually use configured crypto provider for the platform verifier #572

Job	Run time
Check for documentation errors	34s
Clippy	1m 6s
features	1m 50s
Build+test (stable, ubuntu-latest)	2m 54s
Build+test (beta, ubuntu-latest)	3m 40s
msrv	59s
Build+test (nightly, ubuntu-latest)	3m 40s
Check semver compatibility	52s
Format	5s
Build+test (macos-latest, stable)	2m 53s
Build+test (windows-latest, stable)	7m 56s
	26m 29s

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