chore(deps-dev): bump typescript from 3.9.7 to 4.0.2

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.7 to 4.0.2.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/compare/v3.9.7...v4.0.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -66,7 +66,7 @@
     "rollup-plugin-typescript2": "^0.27.2",
     "rollup-plugin-uglify": "^6.0.4",
     "start-server-and-test": "^1.11.3",
-    "typescript": "^3.9.7"
+    "typescript": "^4.0.2"
   },
   "peerDependencies": {
     "react": "^16.13.1"