Update dependency next to v12

Author: renovate-bot

package.json

@@ -17,7 +17,7 @@
     "marked": "^0.8.0",
     "moment": "^2.24.0",
     "moment-strftime": "^0.5.0",
-    "next": "^10.0.0",
+    "next": "12.1.1",
     "node-sass": "^4.14.1",
     "node-sass-utils": "^1.1.3",
     "react": "16.12.0",