fix: target node version

Scrum · Scrum · commit 5aaccdac99c4 · 2019-01-31T11:46:32.000+03:00
diff --git a/package.json b/package.json
@@ -89,7 +89,7 @@
         "@babel/preset-env",
         {
           "targets": {
-            "node": 4
+            "node": 6
           }
         }
       ],
