Ensure image-types file is included (vercel#26495)

Author: ijjk

packages/next/package.json

@@ -41,7 +41,8 @@
     "amp.js",
     "amp.d.ts",
     "types/index.d.ts",
-    "types/global.d.ts"
+    "types/global.d.ts",
+    "image-types/global.d.ts"
   ],
   "bin": {
     "next": "./dist/bin/next"