chore: add yarn command to put compiled stylesheets into builds folder

node_modules/postcss-reporter/lib/util.js

@@ -0,0 +1,19 @@
+exports.getLocation = function (message) {
+  var messageNode = message.node;
+
+  var location = {
+    line: message.line,
+    column: message.column,
+  };
+
+  var messageInput = messageNode && messageNode.source && messageNode.source.input;
+
+  if (!messageInput) return location;
+
+  var originLocation =
+    messageInput.origin && messageInput.origin(message.line, message.column);
+  if (originLocation) return originLocation;
+
+  location.file = messageInput.file || messageInput.id;
+  return location;
+};