Add ignore_tag optional param

I have added handling of ignored tag with a method to set them.

Author: floranpagliai

src/DeepL.php

@@ -39,6 +39,12 @@ class DeepL
      */
     const API_URL_TAG_HANDLING = 'tag_handling=%s';
 
+    /**
+     * API v1 URL: Parameter ignore_tags
+     */
+    const API_URL_IGNORE_TAGS = 'ignore_tags=%s';
+
+
     /**
      * DeepL HTTP error codes
      *
@@ -96,6 +102,13 @@ class DeepL
      */
     protected $curl;
 
+    /**
+     * DeepL ingored tags
+     *
+     * @var array
+     */
+    protected $ignoreTags = [];
+
     /**
      * DeepL constructor
      *
@@ -200,6 +213,11 @@ protected function buildUrl($sourceLanguage, $destinationLanguage, $tagHandling
         if (!empty($tagHandling)) {
             $url .= '&' . sprintf(DeepL::API_URL_TAG_HANDLING, implode(',', $tagHandling));
         }
+        if (!empty($this->ignoreTags)) {
+            $url .= '&' . sprintf(DeepL::API_URL_IGNORE_TAGS, implode(',', $this->ignoreTags));
+        }
+
+
 
         return $url;
     }
@@ -268,4 +286,9 @@ protected function request($url, $body)
 
         return $translationsArray;
     }
+
+    public function setIgnoreTags($ignoreTags)
+    {
+        $this->ignoreTags = $ignoreTags;
+    }
 }