Compare content-length to the length of the request body (#188)

src/Servers/Reverb/Http/Request.php

@@ -33,7 +33,7 @@ public static function from(string $message, Connection $connection, int $maxReq
                 return $request;
             }
 
-            if ($connection->bufferLength() < $contentLength[0] ?? 0) {
+            if ($request->getBody()->getSize() < $contentLength[0] ?? 0) {
                 return null;
             }