Update dependency next to v9 [SECURITY]

Author: renovate-bot

package.json

@@ -75,7 +75,7 @@
     "isomorphic-unfetch": "3.0.0",
     "lodash.take": "4.1.1",
     "marked": "0.8.2",
-    "next": "8.1.0",
+    "next": "9.3.2",
     "nprogress": "0.2.0",
     "path-match": "1.2.4",
     "prop-types": "15.7.2",