fix: phpstan level=6

src/Validator/Rule/AbstractRule.php

@@ -5,43 +5,43 @@ use ctiso\Collection;
 
 abstract class AbstractRule
 {
-    public $field;
+    public string $field;
     protected $errorMsg;
     protected $ctx;
 
-    public function __construct($field, $errorMsg = null)
+    public function __construct(string $field, $errorMsg = null)
     {
         $this->field = $field;
         $this->errorMsg = $errorMsg;
     }
-	
-    public function setName($field)
+
+    public function setName(string $field): self
     {
         $this->field = $field;
         return $this;
     }
 
-    public function setErrorMsg($errorMsg)
+    public function setErrorMsg($errorMsg): self
     {
         $this->errorMsg = $errorMsg;
         return $this;
     }
 
-    public function getErrorMsg()
-    { 
+    public function getErrorMsg(): string
+    {
         return $this->errorMsg;
     }
 
-    public function isValid(Collection $container, $status = null)
+    public function isValid(Collection $container, $status = null): bool
     {
         return true;
     }
 
-    function skipEmpty() {
+    function skipEmpty(): bool {
         return true;
     }
 
-    public function setContext($ctx)
+    public function setContext($ctx): void
     {
         $this->ctx = $ctx;
     }