Changes suggested in review

Author: JakeQZ

CHANGELOG.md

@@ -10,7 +10,7 @@ Please also have a look at our
 
 ### Added
 
-- Interface `CSSElement` (#1231)
+- Add Interface `CSSElement` (#1231)
 - Methods `getLineNumber` and `getColumnNumber` which return a nullable `int`
   for the following classes:
   `Comment`, `CSSList`, `SourceException`, `Charset`, `CSSNamespace`, `Import`,

tests/Unit/RuleSet/Fixtures/ConcreteRuleSet.php

@@ -9,6 +9,9 @@
 
 final class ConcreteRuleSet extends RuleSet
 {
+    /**
+     * @return never
+     */
     public function render(OutputFormat $outputFormat): string
     {
         throw new \BadMethodCallException('Nothing to see here :/', 1744067015);

tests/Unit/Value/Fixtures/ConcreteValue.php

@@ -9,6 +9,9 @@
 
 final class ConcreteValue extends Value
 {
+    /**
+     * @return never
+     */
     public function render(OutputFormat $outputFormat): string
     {
         throw new \BadMethodCallException('Nothing to see here :/', 1744067951);