Bump RDFlib version to prevent error on statically served webIds

Author: jaxoncreed

package-lock.json

@@ -93,7 +93,7 @@
     "oidc-op-express": "^0.0.3",
     "owasp-password-strength-test": "^1.3.0",
     "proper-lockfile": "^3.2.0",
-    "rdflib": "^0.17.1",
+    "rdflib": "^0.20.1",
     "recursive-readdir": "^2.1.0",
     "rimraf": "^2.5.0",
     "solid-auth-client": "^2.2.12",