Redis config cannot accept null values as the given example (#774)

Redis config cannot accept null values as the given example #774 

Co-authored-by: gsot <[email protected]>

Author: GeoSot

lib/Phpfastcache/Drivers/Redis/Config.php

@@ -32,12 +32,12 @@ class Config extends ConfigurationOption
     protected $port = 6379;
 
     /**
-     * @var string
+     * @var null|string
      */
     protected $password = '';
 
     /**
-     * @var int
+     * @var null|int
      */
     protected $database = 0;
 
@@ -93,36 +93,38 @@ public function setPort(int $port): self
     }
 
     /**
-     * @return mixed
+     * @return null|string
      */
     public function getPassword()
     {
         return $this->password;
     }
 
     /**
-     * @param string $password
+     * @param string|null $password
+     *
      * @return self
      */
-    public function setPassword(string $password): self
+    public function setPassword(string $password = null): self
     {
         $this->password = $password;
         return $this;
     }
 
     /**
-     * @return int
+     * @return null|int
      */
-    public function getDatabase(): int
+    public function getDatabase(): ?int
     {
         return $this->database;
     }
 
     /**
-     * @param int $database
+     * @param int|null $database
+     *
      * @return self
      */
-    public function setDatabase(int $database): self
+    public function setDatabase(int $database = null): self
     {
         $this->database = $database;
         return $this;