Export missing oa3 types in Spot Package

[adrian-chang]

Description, Motivation and Context

• Why is this change required?

Bug fix for OA3 types not being exported in root package.

• What does it do?

Exports OA3 Types.

Checklist:

• [x] I've added/updated tests to cover my changes
• [x] I've created an issue associated with this PR
• https://github.com/airtasker/spot/issues/1530

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1 out of 2 committers have signed the CLA.

:white_check_mark: timdawborn
:x: achang-godaddy
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[oben01]

@amchang Could u please accept the license ??

[amoghsharma1996]

Possible to get some action on this?