Optimize dispatch plain object check (#2599)

* Remove lodash.

This boosts perf by not exhaustively checking every action of it's object-ness. We also no longer need to bundle any of lodash, so this saves a good number of bytes too!

* More robust plain object checks.

Author: timdorr

.babelrc

@@ -27,11 +27,6 @@
           }
         ]
       ]
-    },
-    "es": {
-      "plugins": [
-        "./build/use-lodash-es"
-      ]
     }
   }
 }