1.5.0: Added IntToLayerMask, marked QuaternionToEuler as obsolete as of 2021 and fixed a couple of bugs

- Drawer: Added IntToLayerMaskAttribute, if a raw int is wanted instead of LayerMask
- Drawer: Added option to either use full or short type name, when using SerializeReferenceTo
- Extension: Fixed issue, where GetValueType and GetValue for SerializedProperty would throw exceptions, if field is private

Editor/Drawers/QuaternionToEulerAttributeDrawer.cs

@@ -1,4 +1,5 @@
-using Module.Inspector.Editor.Utilities;
+#if !UNITY_2021_1_OR_NEWER
+using Module.Inspector.Editor.Utilities;
 using UnityEditor;
 using UnityEngine;
 
@@ -33,4 +34,5 @@ namespace Module.Inspector.Editor
             return "Only supports quaternions";
         }
     }
-}
+}
+#endif