Target node 10 (can use async)

package.json

@@ -14,7 +14,14 @@
   },
   "babel": {
     "presets": [
+      [
         "@babel/preset-env",
+        {
+          "targets": {
+            "node": "10"
+          }
+        }
+      ],
       "@babel/preset-react"
     ],
     "plugins": [