Release v0.9.0

Allow addition of nested fields to STRUCT columns in incremental tables when schema change config is set to `append_new_columns` or `sync_new_columns`.

---------

Co-authored-by: Catherine Wates <catherine.wates@autotrader.co.uk>
Co-authored-by: Evie Crutchley <evie.crutchley@autotrader.co.uk>