Return false from socket handlers to not dispatch action

client/.eslintrc

@@ -4,6 +4,7 @@
   "env": {
     "browser": true
   },
+  "plugins": ["babel"],
   "rules": {
     "consistent-return": 0,
     "jsx-a11y/click-events-have-key-events": 0,
@@ -19,7 +20,10 @@
     "react/jsx-props-no-spreading": 0,
     "react/prop-types": 0,
     "react/state-in-constructor": 0,
-    "react/static-property-placement": 0
+    "react/static-property-placement": 0,
+
+    "no-unused-expressions": 0,
+    "babel/no-unused-expressions": 2
   },
   "settings": {
     "import/resolver": {