Add zeebe:Properties Support

[philippfromme]

Changes

• add zeebe:Property support for all flow elements
• add zeebe:Property support for element templates

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Closes #731

[nikku]

Is this ready for review?

[nikku]

Do we test optional binding, i.e. entry only being created if non-empty?

[philippfromme]

Do we test optional binding, i.e. entry only being created if non-empty?

I added the missing tests. CI should be green in a minute.

[nikku]

Thanks. Also coverage is happy now! :)

[nikku]

Where exactly did you add the tests 👀

[nikku]

Optional does not work as expected.

In fact I could reproduce using output logging (#747) that an empty optional property npm run start:cloud-templates is still serialized.

[philippfromme]

Optional does not work as expected.

In fact I could reproduce using output logging (#747) that an empty optional property npm run start:cloud-templates is still serialized.

I'll look into that.

[philippfromme]

@nikku I'm not sure what you mean. Do you mean that a property with "optional": true shouldn't end up in the XML unless there is value? I mistook that for not required. 😅

[nikku]

@philippfromme Exactly. Empty fields (according to our optional behavior) shall not be serialized. Mirrors optional input and output mappings.

[philippfromme]

@philippfromme Exactly. Empty fields (according to our optional behavior) shall not be serialized. Mirrors optional input and output mappings.

Okay, implemented.

[nikku]

Verified optional entry change via 0d75f18.

Looks good to me.