Update facade docblocks

Author: taylorotwell

src/Illuminate/Support/Facades/Request.php

@@ -185,6 +185,9 @@
  * @method static array validate(array $rules, ...$params)
  * @method static array validateWithBag(string $errorBag, array $rules, ...$params)
  * @method static bool hasValidSignature(bool $absolute = true)
+ * @method static bool hasValidRelativeSignature()
+ * @method static bool hasValidSignatureWhileIgnoring($ignoreQuery = [], $absolute = true)
+ * @method static bool hasValidRelativeSignatureWhileIgnoring($ignoreQuery = [])
  *
  * @see \Illuminate\Http\Request
  */