Get the path from dirname instead of using Bash variable operators

On Windows, under certain circumstances, the path separator is "\".

This change will ensure compatibility with both Linux and Windows path separators

husky

@@ -1,5 +1,12 @@
 #!/usr/bin/env sh
 [ "$HUSKY" = "2" ] && set -x
+if command -v cygpath >/dev/null 2>&1; then
+  u0=$(cygpath -u "$0")
+  if [ "$0" != "$u0" ]; then
+    exec "$u0" "$@"
+  fi
+fi
+
 h="${0##*/}"
 s="${0%/*/*}/$h"
 

index.mjs

@@ -17,7 +17,7 @@ export default (d = '.husky') => {
 	f.mkdirSync(_(), { recursive: true })
 	w(_('.gitignore'), '*')
 	f.copyFileSync(new URL('husky', import.meta.url), _('h'))
-	l.forEach(h => w(_(h), `#!/usr/bin/env sh\n. "\${0%/*}/h"`, { mode: 0o755 }))
+	l.forEach(h => w(_(h), `#!/usr/bin/env sh\n. "\$(dirname "\$0")/h"`, { mode: 0o755 }))
 	w(_('husky.sh'), '')
 	return ''
 }