Missing MatrixEvent Types

[yyportne]

Some event types are missing:

• m.room.guest_access
• m.room.join_rules
• m.room.redaction

[yyportne]

There is also a event type of org.matrix.room.preview_urls but that one isn't documented in the spec.

[maxidorius]

org.matrix.room.preview_urls is not in the official m. namespace and is therefore a custom event. There is no reason to support it in a SDK.