Upgrade ezcap.

Author: BigBlueHat

package.json

@@ -26,7 +26,7 @@
   "dependencies": {
     "@digitalbazaar/did-method-key": "^3.0.0",
     "@digitalbazaar/ed25519-signature-2020": "^4.0.1",
-    "@digitalbazaar/ezcap": "^3.0.1",
+    "@digitalbazaar/ezcap": "^4.1.0",
     "@digitalbazaar/http-client": "^3.2.0",
     "app-root-path": "^3.0.0",
     "bnid": "^3.0.0",