Update support to v0.8

[brlala]

What would you like to be added:
Update to v0,8

Why is this needed:
V0.8 has lots of new enhancements like async subflow and custom function. All other SDK has already been updated, should this be done as well?

[ricardozanini]

@brlala, it's on our roadmap to upgrade. We are looking for contributions :)

[lsytj0413]

@ricardozanini I'd like to take care of this, because I am reviewing all the existing verifications, relevant to this feature.

[ricardozanini]

@lsytj0413 that's perfectly fine from my side.

[spolti]

Hi all, I'll he helping on this task in the next few days.

The spec for reference: https://github.com/serverlessworkflow/specification/tree/0.8.x/roadmap#-release-version-08

The table below is to help us to track what needs to be completed:

Status	Description	PR
✔️	Support custom function type definition	#80
✔️	Workflow "name" no longer a required property	#81
✔️	Workflow "start" no longer a required property	#84
✔️	ForEach state "iterationParam" no longer a required property	#85
✔️	Added "useData" for eventDataFilter, and "useResults" for actionDataFilter	#79, #82
✔️	Added "resultEventTimeout" for action eventref	#90
✔️	Added example for "continueAs"	#92
✔️	Support for async action invocation	#93
✔️	Support for action condition	#83

If there is a task already added, please let me know. If possible attach the pull request in this issue.

Thanks.

[lsytj0413]

@spolti I'm working on Added "useData" for eventDataFilter, and "useResults" for actionDataFilter

[spolti]

Thanks for the update @lsytj0413.

[spolti]

@lsytj0413 for the item you was working on, in the PR that was merged you have added only the useData, are you going to send another pr for the useResults field?

[lsytj0413]

@lsytj0413 for the item you was working on, in the PR that was merged you have added only the useData, are you going to send another pr for the useResults field?

Yep, i'm working on another PR to add useResults field.