UUIDv7 Draft 3 will simplify node generation (#39)

Author: oittaa

src/UUID.php

@@ -217,10 +217,7 @@ public static function uuid7(): string
         $subsec = self::encodeSubsec($subsec);
         $uhex = substr(str_pad(dechex($unixts), 9, '0', \STR_PAD_LEFT), -9);
         $uhex .= substr_replace(str_pad(dechex($subsec), 6, '0', \STR_PAD_LEFT), '7', -3, 0);
-        do {
-            $node = random_bytes(8);
-        } while ($node === str_repeat(chr(0), 8));
-        $uhex .= bin2hex($node);
+        $uhex .= bin2hex(random_bytes(8));
         return self::uuidFromHex($uhex, 7);
     }