refactor: upgrade prop-types from 15.8.0 to 15.8.1 (#2018)

Author: snyk-bot

package-lock.json

@@ -57,7 +57,7 @@
     "passport": "0.5.2",
     "passport-local": "1.0.0",
     "prismjs": "1.25.0",
-    "prop-types": "15.8.0",
+    "prop-types": "15.8.1",
     "qrcode": "1.5.0",
     "react": "16.14.0",
     "react-ace": "9.5.0",