Merge pull request #14 from yowainwright/snyk-upgrade-6e630fa81fcb7f2eec4e0efb94288a25

[Snyk] Upgrade prop-types from 15.6.1 to 15.7.2

Author: yowainwright

package-lock.json

@@ -46,7 +46,7 @@
     "mocha": "7.1.1",
     "mustache": "^2.2.1",
     "open-browser-webpack-plugin": "^0.0.5",
-    "prop-types": "^15.5.10",
+    "prop-types": "^15.7.2",
     "purecss": "0.6.2",
     "react": "^16.13.0",
     "react-addons-css-transition-group": "^15.1.0",