[CLEANUP] Avoid magic method forwarding in CalcRuleValueList (#1157)

Part of #1147

Author: oliverklee

config/phpstan-baseline.neon

@@ -240,12 +240,6 @@ parameters:
 			count: 3
 			path: ../src/Value/CalcFunction.php
 
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:implode\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/Value/CalcRuleValueList.php
-
 		-
 			message: '#^Call to method Sabberworm\\CSS\\Value\\Color\:\:hasNoneAsComponentValue\(\) with incorrect case\: HasNoneAsComponentValue$#'
 			identifier: method.nameCase

src/Value/CalcRuleValueList.php

@@ -18,6 +18,6 @@ public function __construct(int $lineNumber = 0)
 
     public function render(OutputFormat $outputFormat): string
     {
-        return $outputFormat->implode(' ', $this->components);
+        return $outputFormat->getFormatter()->implode(' ', $this->components);
     }
 }