Bump prop-types from 15.6.2 to 15.7.2

Bumps [prop-types](https://github.com/facebook/prop-types) from 15.6.2 to 15.7.2.
- [Release notes](https://github.com/facebook/prop-types/releases)
- [Changelog](https://github.com/facebook/prop-types/blob/master/CHANGELOG.md)
- [Commits](facebook/prop-types@v15.6.2...v15.7.2)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -64,7 +64,7 @@
     "history": "^4.7.2",
     "jsonminify": "0.4.1",
     "parse-github-url": "^1.0.2",
-    "prop-types": "15.6.2",
+    "prop-types": "15.7.2",
     "react": "^16.8.6",
     "react-autosuggest": "^9.4.2",
     "react-dom": "^16.6.3",