fix: upgrade eslint-plugin-react from 7.28.0 to 7.31.11 (#124)

Snyk has created this PR to upgrade eslint-plugin-react from 7.28.0 to 7.31.11.

See this package in npm:
https://www.npmjs.com/package/eslint-plugin-react

See this project in Snyk:
https://app.snyk.io/org/plan-x/project/43ecce79-408c-4464-831c-06da1d999308?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <snyk-bot@snyk.io>
Co-authored-by: ocshawn <shawnoconnor@uchicago.edu>
Co-authored-by: Shawn O'Connor <ocshawn@ocshawn.com>

package.json

@@ -55,7 +55,7 @@
     "eslint-config-airbnb": "^18.2.1",
     "eslint-plugin-import": "^2.22.1",
     "eslint-plugin-jsx-a11y": "^6.4.1",
-    "eslint-plugin-react": "^7.23.1",
+    "eslint-plugin-react": "^7.31.11",
     "gulp": "^4.0.0",
     "gulp-babel": "^8.0.0",
     "gulp-cli": "^2.0.1",