Fix PHPUnit 8.5 deprecations.

Author: derrabus

Tests/Resource/DirectoryResourceTest.php

@@ -66,7 +66,7 @@ public function testGetPattern()
     public function testResourceDoesNotExist()
     {
         $this->expectException('InvalidArgumentException');
-        $this->expectExceptionMessageRegExp('/The directory ".*" does not exist./');
+        $this->expectExceptionMessageMatches('/The directory ".*" does not exist./');
         new DirectoryResource('/____foo/foobar'.mt_rand(1, 999999));
     }
 

Tests/Resource/FileResourceTest.php

@@ -56,7 +56,7 @@ public function testToString()
     public function testResourceDoesNotExist()
     {
         $this->expectException('InvalidArgumentException');
-        $this->expectExceptionMessageRegExp('/The file ".*" does not exist./');
+        $this->expectExceptionMessageMatches('/The file ".*" does not exist./');
         new FileResource('/____foo/foobar'.mt_rand(1, 999999));
     }