Cannot deserialize the database with button properties

[kosaku-hayashi]

Querying a database containing "button properties" that are new to Notion will fail with the following exception.
Need an appropriate property class that can accept button properties.

Newtonsoft.Json.JsonSerializationException: 'Error converting value "button" to type 'Notion.Client.PropertyValueType'. Path 'type', line 1, position 4445.'

[kosaku-hayashi]

I will address this issue.

[RStolzlechner]

Can anyone merge the related PR? I have the same problem....