fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - react from 16.12.0 to 16.13.0.
    See this package in NPM: https://www.npmjs.com/package/react
  - react-dom from 16.12.0 to 16.13.0.
    See this package in NPM: https://www.npmjs.com/package/react-dom

See this project in Snyk:
https://app.snyk.io/org/coderbyheart/project/01f154c3-c0c6-4eb7-9163-20f988358def?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -64,9 +64,9 @@
     "fp-ts": "^2.5.0",
     "graphql": "^14.6.0",
     "graphql-tag": "^2.10.3",
-    "react": "^16.12.0",
+    "react": "^16.13.0",
     "react-apollo": "^3.1.3",
-    "react-dom": "^16.12.0",
+    "react-dom": "^16.13.0",
     "react-feather": "^2.0.3",
     "showdown": "^1.9.1",
     "styled-components": "^5.0.1",