[TASK] Add native type declarations for CSSString

Part of #811

Author: oliverklee

CHANGELOG.md

@@ -34,7 +34,7 @@ Please also have a look at our
 - Use more native type declarations and strict mode
   (#641, #772, #774, #778, #804, #841, #873, #875, #891, #922, #923, #933, #958,
   #964, #967, #1000, #1044, #1134, #1136, #1137, #1139, #1140, #1141, #1145,
-  #1162, #1163, #1166, #1172, #1174, #1178)
+  #1162, #1163, #1166, #1172, #1174, #1178, #1179)
 - Add visibility to all class/interface constants (#469)
 
 ### Deprecated

config/phpstan-baseline.neon

@@ -114,12 +114,6 @@ parameters:
 			count: 1
 			path: ../src/RuleSet/RuleSet.php
 
-		-
-			message: '#^Parameters should have "string" types as the only types passed to this method$#'
-			identifier: typePerfect.narrowPublicClassMethodParamType
-			count: 1
-			path: ../src/Value/CSSString.php
-
 		-
 			message: '#^Loose comparison via "\!\=" is not allowed\.$#'
 			identifier: notEqual.notAllowed

src/Value/CSSString.php

@@ -23,10 +23,9 @@ class CSSString extends PrimitiveValue
     private $string;
 
     /**
-     * @param string $string
      * @param int<0, max> $lineNumber
      */
-    public function __construct($string, int $lineNumber = 0)
+    public function __construct(string $string, int $lineNumber = 0)
     {
         $this->string = $string;
         parent::__construct($lineNumber);
@@ -74,18 +73,12 @@ public static function parse(ParserState $parserState): CSSString
         return new CSSString($result, $parserState->currentLine());
     }
 
-    /**
-     * @param string $string
-     */
-    public function setString($string): void
+    public function setString(string $string): void
     {
         $this->string = $string;
     }
 
-    /**
-     * @return string
-     */
-    public function getString()
+    public function getString(): string
     {
         return $this->string;
     }