[BUGFIX] Use the safe regexp functions in Selector

config/phpstan-baseline.neon

@@ -84,12 +84,6 @@ parameters:
 			count: 1
 			path: ../tests/ParserTest.php
 
-		-
-			message: '#^Parameter \#1 \$message of static method PHPUnit\\Framework\\Assert\:\:fail\(\) expects string, Exception given\.$#'
-			identifier: argument.type
-			count: 1
-			path: ../tests/ParserTest.php
-
 		-
 			message: '#^Parameter \#1 \$value of method Sabberworm\\CSS\\Rule\\Rule\:\:setValue\(\) expects Sabberworm\\CSS\\Value\\RuleValueList\|string\|null, Sabberworm\\CSS\\Value\\Size given\.$#'
 			identifier: argument.type

src/Property/Selector.php

@@ -8,6 +8,8 @@
 use Sabberworm\CSS\Property\Selector\SpecificityCalculator;
 use Sabberworm\CSS\Renderable;
 
+use function Safe\preg_match;
+
 /**
  * Class representing a single CSS selector. Selectors have to be split by the comma prior to being passed into this
  * class.
@@ -57,7 +59,7 @@ class Selector implements Renderable
     public static function isValid(string $selector): bool
     {
         // Note: We need to use `static::` here as the constant is overridden in the `KeyframeSelector` class.
-        $numberOfMatches = \preg_match(static::SELECTOR_VALIDATION_RX, $selector);
+        $numberOfMatches = preg_match(static::SELECTOR_VALIDATION_RX, $selector);
 
         return $numberOfMatches === 1;
     }

tests/ParserTest.php

@@ -73,11 +73,7 @@ public function files(): void
                     continue;
                 }
                 $parser = new Parser(\file_get_contents($directory . '/' . $filename));
-                try {
-                    self::assertNotEquals('', $parser->parse()->render());
-                } catch (\Exception $e) {
-                    self::fail($e);
-                }
+                self::assertNotSame('', $parser->parse()->render());
             }
             \closedir($directoryHandle);
         }