Bump go.step.sm/crypto from 0.17.0 to 0.19.0

[dependabot[bot]]

Bumps go.step.sm/crypto from 0.17.0 to 0.19.0.

Commits

• 7d1550b Merge pull request #63 from smallstep/attest
• a7834b8 Add test for yubikey.New
• c122aa0 Add some extra coverage
• e247803 Add some extra coverage.
• 0d29297 Add an attestation template and data helper
• d10fc75 Add initial tests for yubikey
• 0a6eaee Add experimental notices
• f2a527d On yubikey CreateSign get the pin from the uri
• 0b8f2d2 Add support for attestation intermediates
• b8cbff2 Add support for attestation using yubikeys
• Additional commits viewable in compare view

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