ssi-zcap-ld 0.3.0

Implementation of ZCAP-LD for the ssi library.
docs.rs failed to build ssi-zcap-ld-0.3.0
Please check the build logs for more information.
See Builds for ideas on how to fix a failed build, or Metadata for how to configure docs.rs builds.
If you believe this is docs.rs' fault, open an issue.
Visit the last successful build: ssi-zcap-ld-0.2.1

ZCAP-LD implementation for SSI.