Verifiers

Ratify currently build external verifiers below.

	Current Version	Supported Version
Cosign	1.1.0	{"1.0.0", "1.1.0"}
Licensechecker	1.0.0	{"1.0.0"}
SBOM	2.0.0-alpha.1	{"1.0.0", "2.0.0-alpha.1"}
schemavalidation	1.0.0	{"1.0.0"}
vulnerabilityreport	1.0.0	{"1.0.0"}