build(deps-dev): bump typescript from 3.9.7 to 4.1.2

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.7 to 4.1.2.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/commits)

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

package.json

@@ -83,7 +83,7 @@
     "source-map-support": "~0.5.16",
     "tap": "~14.10.8",
     "tap-mocha-reporter": "~5.0.0",
-    "typescript": "~3.9.2"
+    "typescript": "~4.1.2"
   },
   "config": {
     "commitizen": {