Fix Param::isPublic() for param with asymmetric visibility

Fixes nikic#1096.

Author: nikic

lib/PhpParser/Node/Param.php

@@ -77,7 +77,7 @@ public function isPublic(): bool {
  return true;
  }
 
- if ($this->hooks === []) {
+ if (!$this->isPromoted()) {
  return false;
  }
 

test/PhpParser/Node/ParamTest.php

@@ -42,10 +42,13 @@ public function testSetVisibility() {
  $node = new Param(new Variable('foo'));
  $node->flags = Modifiers::PRIVATE_SET;
  $this->assertTrue($node->isPrivateSet());
+ $this->assertTrue($node->isPublic());
  $node->flags = Modifiers::PROTECTED_SET;
  $this->assertTrue($node->isProtectedSet());
+ $this->assertTrue($node->isPublic());
  $node->flags = Modifiers::PUBLIC_SET;
  $this->assertTrue($node->isPublicSet());
+ $this->assertTrue($node->isPublic());
  }
 
  public function testPromotedPropertyWithoutVisibilityModifier(): void {