fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - react from 16.13.0 to 16.13.1.
    See this package in NPM: https://www.npmjs.com/package/react
  - react-dom from 16.13.0 to 16.13.1.
    See this package in NPM: https://www.npmjs.com/package/react-dom

See this project in Snyk:
https://app.snyk.io/org/xlogix/project/c50c9246-7ab2-4ea4-9dc2-a67313ea7ded?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -58,11 +58,11 @@
     "gatsby-source-graphql": "^2.1.34",
     "isomorphic-fetch": "^2.2.1",
     "query-string": "^6.11.1",
-    "react": "^16.13.0",
+    "react": "^16.13.1",
     "react-apollo": "^3.1.3",
     "react-dnd": "^5.0.0",
     "react-dnd-html5-backend": "^3.0.2",
-    "react-dom": "^16.13.0",
+    "react-dom": "^16.13.1",
     "react-firebase-file-uploader": "^2.4.3",
     "react-firebaseui": "^4.1.0",
     "react-helmet": "^5.2.1",