Bump typescript from 3.6.3 to 3.9.3

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.6.3 to 3.9.3.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.6.3...v3.9.3)

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

package.json

@@ -52,7 +52,7 @@
     "react-test-renderer": "^16.10.2",
     "redux": "^4.0.1",
     "rimraf": "^2.6.3",
-    "typescript": "^3.5.2",
+    "typescript": "^3.9.3",
     "webpack": "^4.41.6",
     "webpack-cli": "^3.3.5"
   },