[TASK] Use Property\Declaration in CSSBlockList

This replaces `Rule\Rule`, following #1508.

Author: JakeQZ

CHANGELOG.md

@@ -18,7 +18,7 @@ Please also have a look at our
 
 ### Changed
 
-- `Rule\Rule` class is renamed to `Property\Declaration` (#1508)
+- `Rule\Rule` class is renamed to `Property\Declaration` (#1508, #1512)
 - `Rule::setRule()` and `getRule()` are replaced with `setPropertyName()` and
   `getPropertyName()` (#1506)
 - `Selector` is now represented as a sequence of `Selector\Component` objects

src/CSSList/CSSBlockList.php

@@ -5,8 +5,8 @@
 namespace Sabberworm\CSS\CSSList;
 
 use Sabberworm\CSS\CSSElement;
+use Sabberworm\CSS\Property\Declaration;
 use Sabberworm\CSS\Property\Selector;
-use Sabberworm\CSS\Rule\Rule;
 use Sabberworm\CSS\RuleSet\DeclarationBlock;
 use Sabberworm\CSS\RuleSet\RuleContainer;
 use Sabberworm\CSS\RuleSet\RuleSet;
@@ -65,7 +65,7 @@ public function getAllRuleSets(): array
     }
 
     /**
-     * Returns all `Value` objects found recursively in `Rule`s in the tree.
+     * Returns all `Value` objects found recursively in `Declaration`s in the tree.
      *
      * @param CSSElement|null $element
      *        This is the `CSSList` or `RuleSet` to start the search from (defaults to the whole document).
@@ -105,7 +105,7 @@ public function getAllValues(
                     $this->getAllValues($rule, $ruleSearchPattern, $searchInFunctionArguments)
                 );
             }
-        } elseif ($element instanceof Rule) {
+        } elseif ($element instanceof Declaration) {
             $value = $element->getValue();
             // `string` values are discarded.
             if ($value instanceof CSSElement) {