Merge branch '3.4' into 4.4

* 3.4:
  remove superfluous cast
  Change 'cache_key' to AbstractRendererEngine::CACHE_KEY_VAR
  Upgrade PHPUnit to 8.5 (php 7.2) and 9.3 (php >= 7.3).

Author: fabpot

Parser.php

@@ -720,7 +720,7 @@ private function parseValue(string $value, int $flags, string $context)
         if (\in_array($value[0], ['!', '|', '>'], true) && self::preg_match('/^(?:'.self::TAG_PATTERN.' +)?'.self::BLOCK_SCALAR_HEADER_PATTERN.'$/', $value, $matches)) {
             $modifiers = isset($matches['modifiers']) ? $matches['modifiers'] : '';
 
-            $data = $this->parseBlockScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), (int) abs((int) $modifiers));
+            $data = $this->parseBlockScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), abs((int) $modifiers));
 
             if ('' !== $matches['tag'] && '!' !== $matches['tag']) {
                 if ('!!binary' === $matches['tag']) {