Add overlapping group caching

package.json

@@ -24,6 +24,7 @@
     "express": "^4.17.1",
     "express-promise-router": "^4.1.1",
     "express-rate-limit": "^5.5.1",
+    "lodash": "^4.17.21",
     "pg": "^8.7.1",
     "redis": "^3.1.2",
     "sync-mysql": "^3.0.1"
@@ -33,6 +34,7 @@
     "@types/cron": "^1.7.3",
     "@types/express": "^4.17.13",
     "@types/express-rate-limit": "^5.1.3",
+    "@types/lodash": "^4.14.178",
     "@types/mocha": "^9.0.0",
     "@types/node": "^16.11.11",
     "@types/pg": "^8.6.1",