deps: revert to lru-cache@6

Author: lukekarrys

package.json

@@ -47,7 +47,7 @@
     "node": "^10.0.0 || ^12.0.0 || ^14.0.0 || >=16.0.0"
   },
   "dependencies": {
-    "lru-cache": "^7.4.0"
+    "lru-cache": "^6.0.0"
   },
   "author": "GitHub Inc.",
   "templateOSS": {