Support IntelliJ IDEA 2019.3

[bdalenoord]

Issue #821 should add support for IntelliJ IDEA 2019.3, but as it is now publicly available, the plugin no longer works. When reviewing the change for that issue (48d34b2) it dawned upon me that only the Azure pipeline for testing that version was added, not for releasing it...

[bdalenoord]

I think the fix would be to add a ij193 block on line https://github.com/spekframework/spek/blob/2.x/azure-pipelines.yml#L140.

[raniejade]

@bdalenoord you are correct, just the release step is missing. Would you like to send a PR? Otherwise, I'll have time in the weekend do it.

[robstoll]

Now the only thing missing is a release I guess or is the plugin waiting for approval from Intellij? Anyhow, I still have the Incompatible with the current IntelliJ version

[raniejade]

@robstoll so the merge will trigger a dev build which gets published to the dev channel (which is waiting for JB's approval). I need to do an actual release (2.0.9) to get the plugin into the stable channel.