added type hints

src/TokenParser/BlockTokenParser.php

@@ -29,7 +29,7 @@ use Twig\Token;
  */
 final class BlockTokenParser extends AbstractTokenParser
 {
-    public function parse(Token $token)
+    public function parse(Token $token): Node
     {
         $lineno = $token->getLine();
         $stream = $this->parser->getStream();
@@ -64,12 +64,12 @@ final class BlockTokenParser extends AbstractTokenParser
         return new BlockReferenceNode($name, $lineno, $this->getTag());
     }
 
-    public function decideBlockEnd(Token $token)
+    public function decideBlockEnd(Token $token): bool
     {
         return $token->test('endblock');
     }
 
-    public function getTag()
+    public function getTag(): string
     {
         return 'block';
     }