fix: handling \ character

Author: cap-Bernardito

src/utils.js

@@ -378,15 +378,15 @@ const moduleRequestRegex = /^[^?]*~/;
 const matchNativeWin32Path = /^[A-Z]:[/\\]|^\\\\/i;
 
 export function requestify(url) {
-  if (matchNativeWin32Path.test(url) || url[0] === '/') {
+  if (matchNativeWin32Path.test(url) || url[0] === '/' || url[0] === '\\') {
     return url;
   }
 
   if (/^file:/i.test(url)) {
     return url;
   }
 
-  if (/^\.\.?\//.test(url)) {
+  if (/(^\.\.?\/)|(^\.\.?\\)/.test(url)) {
     return url;
   }
 

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

@@ -436,4 +436,9 @@ <h2>An Ordered HTML List</h2>
 
 <meta itemprop="a" content="./image.png" />
 <meta itemprop="b" content="./image.png" />
-<meta itemprop=" " content="./image.png" />
+<meta itemprop=" " content="./image.png" />
+
+<img src='.\nested\image3.png' />
+<img src='\nested\image3.png' />
+<img src='/nested\image3.png' />
+<img src='nested\image3.png' />