chore(package): update enzyme to version 3.4.4

Closes #22

Author: greenkeeper[bot]

package.json

@@ -21,7 +21,7 @@
     "babel-core": "^6.25.0",
     "babel-preset-es2015": "^6.24.1",
     "babel-preset-stage-3": "^6.24.1",
-    "enzyme": "^3.0.0",
+    "enzyme": "^3.4.4",
     "enzyme-adapter-react-16": "^1.0.0",
     "fixpack": "^2.3.1",
     "prettier": "^1.13.5",