chore(deps-dev): bump typescript from 3.8.2 to 3.9.6

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.8.2 to 3.9.6.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/commits)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -21,7 +21,7 @@
     "react-scripts": "^3.4.0",
     "ts-jest": "^24.0.2",
     "tslint": "^5.17.0",
-    "typescript": "^3.5.1"
+    "typescript": "^3.9.6"
   },
   "browserslist": {
     "production": [