chore(package): update enzyme-adapter-react-16 to version 1.9.1

Closes #351

Author: greenkeeper[bot]

package.json

@@ -143,7 +143,7 @@
     "dotenv": "6.0.0",
     "dotenv-webpack": "1.5.7",
     "enzyme": "3.8.0",
-    "enzyme-adapter-react-16": "1.7.1",
+    "enzyme-adapter-react-16": "1.9.1",
     "enzyme-to-json": "^3.3.4",
     "eslint": "5.6.0",
     "eslint-config-airbnb": "17.1.0",