fix(deps): update dependency @typescript-eslint/eslint-plugin to ^1.9.0 (#114)

Author: renovate[bot]

package.json

@@ -40,7 +40,7 @@
     "typescript": "^3.3.3333"
   },
   "dependencies": {
-    "@typescript-eslint/eslint-plugin": "^1.6.0",
+    "@typescript-eslint/eslint-plugin": "^1.9.0",
     "babel-eslint": "^9.0.0",
     "eslint-config-prettier": "^4.1.0",
     "eslint-plugin-flowtype": "^3.6.1",