Bump typescript from 4.1.3 to 4.1.5

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 4.1.3 to 4.1.5.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v4.1.3...v4.1.5)

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

package.json

@@ -55,7 +55,7 @@
     "gulp": "^4.0.2",
     "jest": "^24.9.0",
     "ts-jest": "^24.3.0",
-    "typescript": "^4.1.3",
+    "typescript": "^4.1.5",
     "vinyl": "^2.2.1",
     "vinyl-source-stream": "^2.0.0"
   },