Serverless specificaction with v08 spec

[spolti]

This PR aims to align the sdk with the v08 spec.
Fixes: #70

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What this PR does / why we need it:
Initial alignment with v08 spec

[ricardozanini]

I think we should map all the required changes for v0.8 and handle them in this PR or strict the scope of this one. "v08spec" as a title seems too wide.

[lsytj0413]

I think we should map all the required changes for v0.8 and handle them in this PR or strict the scope of this one. "v08spec" as a title seems too wide.

Maybe make a PR do one change, and mark all of them as v0.8 Milestone？

[spolti]

e should map all the required changes for v0.8

the changes needed are mapped here #70
Or are you suggesting something different?

[ricardozanini]

@spolti open PRs to change to 0.8 like what @lsytj0413 is doing. So we can keep them on track using the milestone feature.

[ricardozanini]

Or if this is a small change (which I'm not sure of), you can do in this one PR.

[spolti]

ok...
let me break each commit in different prs...

[spolti]

suppressed by:

• v08 spec alignment - Support custom function type definition #80
• v08 spec alignment - Workflow name no longer a required property #81
• v08 spec alignment - Workflow start no longer a required property #84
• v08 spec alignment - ForEach state iterationParam no longer a require… #85
• v08 spec aligment - Added resultEventTimeout for action eventref #90

will send the other PRs as soon as the previous gets merged as it depends on each other.