Allow templates in labels

[dblock]

This didn't work:

labels: untriaged, release, v{{ env.VERSION }}

[JasonEtco]

Ooh I like that, we should definitely allow this. I'd mean a change here:

create-an-issue/src/action.ts

Lines 30 to 33 in 2fa1fa4

	const templated = {
	body: env.renderString(body, templateVariables),
	title: env.renderString(attributes.title, templateVariables)
	}

Probably something like:

labels: listToArray(attributes.labels).map(label => env.renderString(label, templateVariables)

And then use template.labels in the final issue payload. This seems complicated in conjunction with #100, when issue labels will require removing labels as well as adding them, but we can cross that bridge when we get to it.

[JasonEtco]

Looks like there's already a PR for this in progress: #95

[dblock]

Finished in #119

[dblock]

This is fixed in https://github.com/dblock/create-a-github-issue, a maintained fork.