fix: updated list of boolean attributes

Author: egil

CHANGELOG.md

@@ -1,6 +1,7 @@
 # 0.18.3
 
 - Enabled using `diff:ignoreAttributes` and `diff:ignoreChildren` together on the same element.
+- Corrected list of attributes that is considered as boolean attributes. Removed `hidden`, added `inert`, `playsinline`, `shadowrootclonable`, `shadowrootdelegatesfocus`, and `shadowrootserializable`.
 
 # 0.18.2
 

src/AngleSharp.Diffing/Strategies/AttributeStrategies/BooleanAttributeComparer.cs

@@ -5,7 +5,7 @@
 /// </summary>
 public class BooleanAttributeComparer
 {
-    private static readonly HashSet<string> BooleanAttributesSet = new HashSet<string>()
+    private static readonly HashSet<string> BooleanAttributesSet = new(StringComparer.OrdinalIgnoreCase)
     {
         "allowfullscreen",
         "allowpaymentrequest",
@@ -18,7 +18,7 @@ public class BooleanAttributeComparer
         "defer",
         "disabled",
         "formnovalidate",
-        "hidden",
+        "inert",
         "ismap",
         "itemscope",
         "loop",
@@ -27,10 +27,14 @@ public class BooleanAttributeComparer
         "nomodule",
         "novalidate",
         "open",
+        "playsinline",
         "readonly",
         "required",
         "reversed",
         "selected",
+        "shadowrootclonable",
+        "shadowrootdelegatesfocus",
+        "shadowrootserializable",
         "typemustmatch"
     };