Bump typescript from 2.9.2 to 3.5.1

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 2.9.2 to 3.5.1.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v2.9.2...v3.5.1)

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

package.json

@@ -42,7 +42,7 @@
     "nyc": "^14.1.1",
     "tmp": "0.0.33",
     "ts-node": "^8.2.0",
-    "typescript": "^2.9.2"
+    "typescript": "^3.5.1"
   },
   "dependencies": {
     "i18next": "^9.1.0",