feat: upgrade lru-cache from 5.1.1 to 6.0.0

Snyk has created this PR to upgrade lru-cache from 5.1.1 to 6.0.0.

See this package in npm:
https://www.npmjs.com/package/lru-cache

See this project in Snyk:
https://app.snyk.io/org/acinader/project/21343059-02d9-4182-87d7-718a44b181ef?utm_source=github&utm_medium=referral&page=upgrade-pr

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",