fix(package): update expect to version 25.3.0

Closes #156

Author: greenkeeper[bot]

package.json

@@ -15,7 +15,7 @@
     "babel-eslint": "^8.0.3",
     "enzyme-to-json": "^3.2.2",
     "eslint": "^4.13.0",
-    "expect": "^22.0.0",
+    "expect": "^25.3.0",
     "firebase": "^4.8.0",
     "history": "^4.7.2",
     "husky": "^0.14.3",