Skip these tests as php/php-src#7546 has not been merged yet

Author: sebastianbergmann

tests/unit/ReflectionMapperTest.php

@@ -148,6 +148,8 @@ public function testMapsFromNeverReturnType(): void
      */
     public function testMapsFromFalseReturnType(): void
     {
+        $this->markTestSkipped('https://github.com/php/php-src/pull/7546 has not been merged yet');
+
         $type = (new ReflectionMapper)->fromReturnType(new ReflectionMethod(ClassWithMethodThatDeclaresFalseReturnType::class, 'falseReturnType'));
 
         $this->assertInstanceOf(FalseType::class, $type);
@@ -159,6 +161,8 @@ public function testMapsFromFalseReturnType(): void
      */
     public function testMapsFromNullReturnType(): void
     {
+        $this->markTestSkipped('https://github.com/php/php-src/pull/7546 has not been merged yet');
+
         $type = (new ReflectionMapper)->fromReturnType(new ReflectionMethod(ClassWithMethodThatDeclaresNullReturnType::class, 'nullReturnType'));
 
         $this->assertInstanceOf(NullType::class, $type);