Bump typescript from 3.9.7 to 4.0.3 (#35)

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.7 to 4.0.3.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.9.7...v4.0.3)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

package.json

@@ -52,7 +52,7 @@
     "np": "^6.2.4",
     "react": "^16.0.0",
     "react-dom": "^16.0.0",
-    "typescript": "^3.2.2"
+    "typescript": "^4.0.3"
   },
   "dependencies": {
     "@babel/runtime": "^7.10.1",