Better seriesCall

lib/util.js

@@ -70,22 +70,15 @@ class Util {
   /**
    * Serialize a series of asynchronous calls to a function
    * over a list of objects
-   * ref: http://www.joezimjs.com/javascript/patterns-asynchronous-programming-promises/
    */
-  static seriesCall(list, fn) {
+  static async seriesCall(list, fn) {
     const results = []
 
-    return list.reduce((memo, item) => {
+    for (const item of list) {
-        return memo.then(() => {
+      results.push(await fn(item));
-          return fn(item)
+    }
-        }).then(result => {
+
-          results.push(result)
+    return results;
-        })
-      },
-      Promise.resolve()
-    ).then(function() {
-      return results
-    })
   }
 
   /**