build(deps-dev): bump typescript from 3.7.3 to 4.1.2

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.7.3 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>

Author: dependabot-preview[bot]

package-lock.json

@@ -38,7 +38,7 @@
     "json-schema-ref-parser": "^7.0.1",
     "ts-jest": "^24.0.0",
     "tslint": "^5.14.0",
-    "typescript": "^3.3.4000"
+    "typescript": "^4.1.2"
   },
   "files": [
     "build"