0.4.0-preview

[0.4.0-preview] - 2021-08-18

Added

• add global palette texture field to be used as the default palette texture
• doc: put links to the official docs in the github top readme page

Changed

• deps: update dependency to com.unity.film-internal-utilities@0.10.2-preview
• test: add test against Unity 2021.2

Removed

• doc: delete obsolete contents in the top readme