Fixes codestyle

Author: SmetDenis

src/Str.php

@@ -607,7 +607,7 @@ public static function isEnd(string $haystack, string $needle, bool $caseSensiti
      */
     public static function trim(string $value, bool $extendMode = false): string
     {
-        $result = (string)trim($value);
+        $result = trim($value);
 
         if ($extendMode) {
             $result = trim($result, chr(0xE3) . chr(0x80) . chr(0x80));

src/Sys.php

@@ -257,7 +257,7 @@ public static function getNameWithVersion(): string
         $name = self::getName();
         $version = self::getVersion();
 
-        return (string)trim("{$name} {$version}");
+        return trim("{$name} {$version}");
     }
 
     /**

src/Url.php

@@ -119,7 +119,7 @@ public static function current(bool $addAuth = false): ?string
         $root = self::root($addAuth);
         $path = self::path();
 
-        return (string)trim("{$root}{$path}") ?: null;
+        return trim("{$root}{$path}") ?: null;
     }
 
     /**