fix: line breaks in url function

Author: evilebottnawi

src/utils.js

@@ -78,8 +78,8 @@ function defaultGetLocalIdent(
 function normalizeUrl(url, isStringValue) {
   let normalizedUrl = url;
 
-  if (isStringValue && /\\[\n]/.test(normalizedUrl)) {
-    normalizedUrl = normalizedUrl.replace(/\\[\n]/g, '');
+  if (isStringValue && /\\(\n|\r\n|\r|\f)/.test(normalizedUrl)) {
+    normalizedUrl = normalizedUrl.replace(/\\(\n|\r\n|\r|\f)/g, '');
   }
 
   if (matchNativeWin32Path.test(url)) {

test/__snapshots__/url-option.test.js.snap

@@ -301,8 +301,13 @@ a {
   background: url("./img img.png");
 }
 
+/* Comment */
+
 .class.class.class {
   background: url('./img\
+(img.png');
+  background: url('./img\(img.png');
+  background: url('./img\
 (img.png');
   background: url('./img\
 \