fix: upgrade express from 4.17.1 to 4.17.2

Snyk has created this PR to upgrade express from 4.17.1 to 4.17.2.

See this package in npm:
https://www.npmjs.com/package/express

See this project in Snyk:
https://app.snyk.io/org/jswheeler/project/b6316121-1038-44d9-af07-9eabeebe6c6c?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -46,7 +46,7 @@
   },
   "dependencies": {
     "@reach/router": "^1.3.4",
-    "express": "^4.17.1",
+    "express": "^4.17.2",
     "react": "^16.12.0",
     "react-dom": "^16.12.0",
     "react-use": "^15.3.4"