Tax type should also accept 'union'

[ndvo]

Tax type can be 'union'.

Documentation at https://api.foxycart.com/rels/tax is outdated as reported in this issue.

https://github.com/Foxy/foxy-sdk/blob/1a76e4351b12b1ccb82727b28359edc6f6776870/src/backend/Graph/tax.d.ts#L24

[github-actions[bot]]

:tada: This issue has been resolved in version 1.5.0-beta.2 :tada:

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot :package::rocket:

[github-actions[bot]]

:tada: This issue has been resolved in version 1.5.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: