feat: #27 support attribute tests

Thanks to @mimre25!

lua/neotest-phpunit/init.lua

@@ -113,6 +113,18 @@ function NeotestAdapter.discover_positions(path)
       name: (name) @namespace.name (#match? @namespace.name "Test")
     )) @namespace.definition
 
+    ((method_declaration
+      (attribute_list
+        (attribute_group
+            (attribute) @test_attribute (#match? @test_attribute "Test")
+        )
+      )
+      (
+        (visibility_modifier) @test.definition
+        (name) @test.name
+      )
+     ))
+
     ((method_declaration
       (name) @test.name (#match? @test.name "test")
     )) @test.definition

tests/Unit/AttributeTest.php

@@ -0,0 +1,13 @@
+<?php
+
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+class AttributeTest extends TestCase
+{
+    #[Test]
+    public function it_should_pass_if_attributes_work()
+    {
+        $this->assertTrue(true);
+    }
+}