Merge pull request #18 from TheDragonCode/2.x

Added `doesntHave` method for Laravel Cache package

Author: Andrey Helldar

src/Cache/Store.php

@@ -48,11 +48,18 @@ public function put(string $key, $value, int $seconds);
      * @param  string  $key
      */
     public function forget(string $key): void;
-    
+
     /**
      * Checks for the existence of a key.
      *
      * @param  string  $key
      */
     public function has(string $key): bool;
+
+    /**
+     * Checks the key for its absence.
+     *
+     * @param  string  $key
+     */
+    public function doesntHave(string $key): bool;
 }