Add doc for DivisibleBy

Author: arifszn

README.md

@@ -49,6 +49,7 @@ public function rules()
 - [`Btc Address`](#btcaddress)
 - [`Credit Card`](#creditcard)
 - [`Data URI`](#datauri)
+- [`Divisible By`](#divisibleby)
 - [`Float Number`](#floatnumber)
 - [`Image URL`](#imageurl)
 - [`Phone`](#phone)
@@ -160,6 +161,21 @@ public function rules()
 }
 ```
 
+### `DivisibleBy`
+
+The field under validation must be divisible by the given number.
+
+```php
+use Arifszn\AdvancedValidation\Rules\DivisibleBy;
+
+public function rules()
+{
+    return [
+        'foo' => [new DivisibleBy(2)],
+    ];
+}
+```
+
 ### `FloatNumber`
 
 The field under validation must be a float number.

src/Rules/DivisibleBy.php

@@ -6,7 +6,7 @@
 use Illuminate\Support\Facades\Validator;
 
 /**
- * The field under validation must be divisible by another.
+ * The field under validation must be divisible by the given number.
  *
  * @package Arifszn\AdvancedValidation\Rules
  */