Update async to latest, try to diagnose SCSS resource query issue

Author: catarak

client/styles/abstracts/_variables.scss

@@ -96,8 +96,8 @@ $themes: (
     error-color: $p5js-pink,
     table-row-stripe-color: $medium-light,
     table-row-stripe-color-alternate: $medium-light,
-    codefold-icon-open: url(../images/triangle-arrow-down.svg?byUrl),
-    codefold-icon-closed: url(../images/triangle-arrow-right.svg?byUrl),
+    codefold-icon-open: url("../images/triangle-arrow-down.svg?byUrl"),
+    codefold-icon-closed: url("../images/triangle-arrow-right.svg?byUrl"),
 
     primary-button-color: $lightest,
     primary-button-background-color: $p5js-pink,
@@ -178,8 +178,8 @@ $themes: (
     error-color: $p5js-pink,
     table-row-stripe-color: $dark,
     table-row-stripe-color-alternate: $darker,
-    codefold-icon-open: url(../images/triangle-arrow-down-white.svg?byUrl),
-    codefold-icon-closed: url(../images/triangle-arrow-right-white.svg?byUrl),
+    codefold-icon-open: url("../images/triangle-arrow-down-white.svg?byUrl"),
+    codefold-icon-closed: url("../images/triangle-arrow-right-white.svg?byUrl"),
 
     primary-button-color: $lightest,
     primary-button-background-color: $p5js-pink,
@@ -258,8 +258,8 @@ $themes: (
     error-color: $p5-contrast-pink,
     table-row-stripe-color: $dark,
     table-row-stripe-color-alternate: $darker,
-    codefold-icon-open: url(../images/triangle-arrow-down-white.svg?byUrl),
-    codefold-icon-closed: url(../images/triangle-arrow-right-white.svg?byUrl),
+    codefold-icon-open: url("../images/triangle-arrow-down-white.svg?byUrl"),
+    codefold-icon-closed: url("../images/triangle-arrow-right-white.svg?byUrl"),
 
     primary-button-color: $lightest,
     primary-button-background-color: $p5js-pink,