chore(deps): update dependency typescript to ~3.5.0 (#420)

Author: renovate[bot]

package.json

@@ -91,6 +91,6 @@
     "proxyquire": "^2.1.0",
     "sinon": "^7.3.2",
     "tmp": "0.1.0",
-    "typescript": "~3.4.5"
+    "typescript": "~3.5.0"
   }
 }