Lower @babel/env target to Node 4.

jdalton · jdalton · commit ea8d4d31919b · 2018-06-10T20:15:54.000-07:00
diff --git a/.babelrc b/.babelrc
@@ -7,7 +7,7 @@
     ["@babel/env", {
       "loose": true,
       "targets": {
-        "node": 6
+        "node": 4
       }
     }]
   ]
