Added fields on Slack Section block

src/Symfony/Component/Notifier/Bridge/Slack/Block/SlackSectionBlock.php

@@ -34,6 +34,19 @@ final class SlackSectionBlock extends AbstractSlackBlock
         return $this;
     }
 
+    /**
+     * @return $this
+     */
+    public function field(string $text, bool $markdown = true): self
+    {
+        $this->options['fields'][] = [
+            'type' => $markdown ? 'mrkdwn' : 'plain_text',
+            'text' => $text,
+        ];
+
+        return $this;
+    }
+
     /**
      * @return $this
      */