fix(deps): update dependency redux to v4.2.1 (#621)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -53,7 +53,7 @@
     "react-redux": "7.2.9",
     "react-router": "5.2.1",
     "react-router-dom": "5.3.0",
-    "redux": "4.1.2",
+    "redux": "4.2.1",
     "regenerator-runtime": "0.14.0",
     "timeago.js": "4.0.2",
     "tinymce": "5.10.7",