Add more safe html types

- b for bold
- del for semantic redaction
- s, strike for strikethroughs
- h6 was missing

config/purify.php

@@ -69,7 +69,7 @@ return [
 
         'HTML.Allowed' => env('RESTRICT_HTML_TYPES', true) ? 
             'a[href|title|rel],p,span,br' :
-            'a[href|title|rel],p,span,strong,em,i,h1,h2,h3,h4,h5,ul,ol,li,br',
+            'a[href|title|rel],p,span,strong,em,del,b,i,s,strike,h1,h2,h3,h4,h5,h6,ul,ol,li,br',
 
 
         /*