FIO-8354: fallback to passing response in argument if response.body is undefined

[ZenMasterJacob20011]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-8354

Description

What changed?

Changed the events emitted by Formio to fallback to passing the response object to emit argument if response.body is undefined. This allows for clients using this api to handle these events based on the data in the response object.

I chose this solution because it allows for backwards compatibility by keeping response.body as a possible argument in the emit function

Breaking Changes / Backwards Compatibility

None

Dependencies

N/A

How has this PR been tested?

manually tested

Checklist:

• I have completed the above PR template
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• My changes include tests that prove my fix is effective (or that my feature works as intended)
• New and existing unit/integration tests pass locally with my changes
• Any dependent changes have corresponding PRs that are listed above

[brendanbond]

Why can't we write simple unit tests for this event emission?

[ZenMasterJacob20011]

I'll start writing tests when I make changes