fix: test failures on macOS

`var` is a symlink to `private/var` on macOS

Author: kenjis

system/Publisher/Publisher.php

@@ -229,6 +229,7 @@ final public function getScratch(): string
         if ($this->scratch === null) {
             $this->scratch = rtrim(sys_get_temp_dir(), DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . bin2hex(random_bytes(6)) . DIRECTORY_SEPARATOR;
             mkdir($this->scratch, 0700);
+            $this->scratch = realpath($this->scratch) . DIRECTORY_SEPARATOR;
         }
 
         return $this->scratch;

tests/system/Publisher/PublisherSupportTest.php

@@ -144,6 +144,7 @@ public function testWipe()
     {
         $directory = rtrim(sys_get_temp_dir(), DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . bin2hex(random_bytes(6));
         mkdir($directory, 0700);
+        $directory = realpath($directory);
         $this->assertDirectoryExists($directory);
         config('Publisher')->restrictions[$directory] = ''; // Allow the directory