Merge remote-tracking branch 'origin/master' into LOG-8039-update

lib/winston-loggly.js

@@ -143,11 +143,11 @@ Loggly.prototype.log = function(meta, callback) {
     callback && callback(err, result);
   }
 
-  result =
-    meta && meta.tags
-      ? this.client.log(message, meta.tags, logged)
-      : this.client.log(message, logged);
+  const result = (meta && meta.tags)
+    ? this.client.log(message, meta.tags, logged)
+    : this.client.log(message, logged);
 
+  callback();
   return result;
 };