chore(package): update expect to version 23.6.0

Closes #137

Author: greenkeeper[bot]

package.json

@@ -70,7 +70,7 @@
     "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-jsx-a11y": "^6.0.3",
     "eslint-plugin-react": "^7.0.1",
-    "expect": "^1.18.0",
+    "expect": "^23.6.0",
     "html-webpack-plugin": "^3.0.0",
     "husky": "^0.14.3",
     "jest": "^22.0.0",