Update redux requirement to ^4.0.0 in /services/client (#54)

Updates the requirements on [redux](https://github.com/reactjs/redux) to permit the latest version.
- [Release notes](https://github.com/reactjs/redux/releases)
- [Changelog](https://github.com/reactjs/redux/blob/master/CHANGELOG.md)
- [Commits](https://github.com/reactjs/redux/commits/v4.0.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

services/client/package.json

@@ -34,7 +34,7 @@
     "react-router-dom": "^4.2.2",
     "react-scripts": "^1.1.1",
     "react-select": "^1.2.1",
-    "redux": "^3.7.2",
+    "redux": "^4.0.0",
     "redux-devtools-extension": "^2.13.2",
     "redux-logger": "^3.0.6",
     "redux-thunk": "^2.2.0",