chore: add @types/i18n

Author: rocwind

package-lock.json

@@ -76,6 +76,7 @@
     "@types/cookie-parser": "1.4.2",
     "@types/formidable": "2.0.4",
     "@types/fs-extra": "9.0.13",
+    "@types/i18n": "0.13.2",
     "@types/jsonwebtoken": "8.5.8",
     "@types/lodash": "4.14.180",
     "@types/node-fetch": "2.6.1",