fix(package): update next to version 9.4.1

Closes #185

Author: greenkeeper[bot]

package.json

@@ -52,7 +52,7 @@
     "lodash.mapvalues": "^4.6.0",
     "lodash.throttle": "^4.1.1",
     "lru-cache": "^4.1.2",
-    "next": "^7.0.1",
+    "next": "^9.4.1",
     "next-offline": "^3.0.2",
     "react": "^16.4.1",
     "react-apollo": "^2.1.0",