Update dependency express to v4.18.1

Author: renovate-bot

package.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/nteract/nteract.io/issues"
   },
   "dependencies": {
-    "express": "4.18.0",
+    "express": "4.18.1",
     "isomorphic-fetch": "3.0.0",
     "mdi-react": "8.3.1",
     "next": "8.1.0",

yarn.lock

@@ -2504,10 +2504,10 @@ expand-brackets@^2.1.4:
     snapdragon "^0.8.1"
     to-regex "^3.0.1"
 
-[email protected].0:
-  version "4.18.0"
-  resolved "https://registry.yarnpkg.com/express/-/express-4.18.0.tgz#7a426773325d0dd5406395220614c0db10b6e8e2"
-  integrity sha512-EJEXxiTQJS3lIPrU1AE2vRuT7X7E+0KBbpm5GSoK524yl0K8X+er8zS2P14E64eqsVNoWbMCT7MpmQ+ErAhgRg==
+[email protected].1:
+  version "4.18.1"
+  resolved "https://registry.yarnpkg.com/express/-/express-4.18.1.tgz#7797de8b9c72c857b9cd0e14a5eea80666267caf"
+  integrity sha512-zZBcOX9TfehHQhtupq57OF8lFZ3UZi08Y97dwFCkD8p9d/d2Y3M+ykKcwaMDEL+4qyUolgBDX6AblpR3fL212Q==
   dependencies:
     accepts "~1.3.8"
     array-flatten "1.1.1"