tidy: php 8.0 compatibility

Author: g105b

src/PseudoSelectorConverter.php

@@ -5,13 +5,17 @@
 class PseudoSelectorConverter {
 	/** @var array<int, string> */
 	private const BOOLEAN_ATTRIBUTES = ["disabled", "checked", "selected"];
+	private SelectorListSplitter $selectorListSplitter;
+	private NotSelectorConditionBuilder $notSelectorConditionBuilder;
 
 	public function __construct(
-		private readonly SelectorListSplitter $selectorListSplitter
-			= new SelectorListSplitter(),
-		private readonly NotSelectorConditionBuilder $notSelectorConditionBuilder
-			= new NotSelectorConditionBuilder(),
+		?SelectorListSplitter $selectorListSplitter = null,
+		?NotSelectorConditionBuilder $notSelectorConditionBuilder = null,
 	) {
+		$this->selectorListSplitter = $selectorListSplitter
+			?? new SelectorListSplitter();
+		$this->notSelectorConditionBuilder = $notSelectorConditionBuilder
+			?? new NotSelectorConditionBuilder();
 	}
 
 	/**

src/SingleSelectorConverter.php

@@ -3,13 +3,20 @@
 namespace Gt\CssXPath;
 
 class SingleSelectorConverter {
+	private ThreadMatcher $threadMatcher;
+	private PseudoSelectorConverter $pseudoSelectorConverter;
+	private AttributeSelectorConverter $attributeSelectorConverter;
+
 	public function __construct(
-		private readonly ThreadMatcher $threadMatcher = new ThreadMatcher(),
-		private readonly PseudoSelectorConverter $pseudoSelectorConverter
-			= new PseudoSelectorConverter(),
-		private readonly AttributeSelectorConverter $attributeSelectorConverter
-			= new AttributeSelectorConverter(),
+		?ThreadMatcher $threadMatcher = null,
+		?PseudoSelectorConverter $pseudoSelectorConverter = null,
+		?AttributeSelectorConverter $attributeSelectorConverter = null,
 	) {
+		$this->threadMatcher = $threadMatcher ?? new ThreadMatcher();
+		$this->pseudoSelectorConverter = $pseudoSelectorConverter
+			?? new PseudoSelectorConverter();
+		$this->attributeSelectorConverter = $attributeSelectorConverter
+			?? new AttributeSelectorConverter();
 	}
 
 	public function convert(