Upgrade packages (#86)

Co-authored-by: Marvin Sextro <marvin.sextro@gmail.com>

next-env.d.ts

@@ -1,3 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/types/global" />
 /// <reference types="next/image-types/global" />
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/basic-features/typescript for more information.

package.json

@@ -18,7 +18,7 @@
     "file-saver": "^2.0.5",
     "jpeg-js": "^0.4.3",
     "jsqr": "^1.4.0",
-    "next": "latest",
+    "next": "^11.1.0",
     "next-i18next": "^8.5.1",
     "next-seo": "^4.26.0",
     "node-fetch": "^2.6.1",