refactor: upgrade lru-cache from 5.1.1 to 6.0.0 (#7813)

Author: snyk-bot

package-lock.json

@@ -44,7 +44,7 @@
     "jwks-rsa": "2.0.5",
     "ldapjs": "2.3.1",
     "lodash": "4.17.21",
-    "lru-cache": "5.1.1",
+    "lru-cache": "6.0.0",
     "mime": "3.0.0",
     "mongodb": "4.3.1",
     "mustache": "4.2.0",