Update dependency typescript to v3 (#23)

Author: renovate[bot]

package-lock.json

@@ -40,7 +40,7 @@
     "rollup-plugin-commonjs": "9.1.4",
     "rollup-plugin-node-builtins": "2.1.2",
     "tslint": "5.11.0",
-    "typescript": "2.9.2"
+    "typescript": "3.0.1"
   },
   "lint-staged": {
     "*.ts": [