chore(deps) Update dependency isbot to v4

Author: renovate[bot]

package-lock.json

@@ -122,7 +122,7 @@
     "emojilib": "^3.0.10",
     "express": "^4.18.2",
     "imap": "^0.8.19",
-    "isbot": "^3.6.10",
+    "isbot": "^4.0.0",
     "ldap-authentication": "github:shaozi/ldap-authentication#upgrade-ldapjs-3",
     "ldapjs-promise": "^3.0.0",
     "lexical": "^0.12.0",
@@ -229,5 +229,5 @@
       "npm run format"
     ]
   },
-  "version": "1.1.15"
+  "version": "1.1.16"
 }