Fix build for Pest

Author: maks-rafalko

src/TestFramework/PhpUnit/Adapter/PestAdapter.php

@@ -76,7 +76,7 @@ public function testsPass(string $output): bool
 
     public function isSyntaxError(string $output): bool
     {
-        return preg_match('/ParseError\s*syntax error/i', $output) === 1;
+        return preg_match('/(ParseError\s*syntax error|Syntax Error for Pest)/i', $output) === 1;
     }
 
     public function hasJUnitReport(): bool

tests/e2e/Syntax_Error_Pest/composer.json

@@ -11,5 +11,10 @@
         "psr-4": {
             "Syntax_Error_Pest\\Test\\": "tests/"
         }
+    },
+    "config": {
+        "allow-plugins": {
+            "pestphp/pest-plugin": true
+        }
     }
 }