Use @db/vc 7.0.0.

Author: aljones15

package.json

@@ -50,7 +50,7 @@
     "@digitalbazaar/http-client": "^4.0.0",
     "@digitalbazaar/mocha-w3c-interop-reporter": "^1.6.0",
     "@digitalbazaar/multikey-context": "^2.0.1",
-    "@digitalbazaar/vc": "github:digitalbazaar/vc#update-vc-2.0",
+    "@digitalbazaar/vc": "^7.0.0",
     "@digitalcredentials/did-context": "^1.0.0",
     "base58-universal": "^2.0.0",
     "base64url-universal": "^2.0.0",