add a cron job to test packages for future releases.

[satra]

we should perhaps add a non-authoritative cron-job test to test against future releases of pydra. not super important at the moment, but it may help a user to debug if a future pydra version broke the task package and should be updated/maintained.

i'm hoping more generally that we can do what conda-forge does with auto PRs against new releases. in this case it would send a PR to a task package to update the upper limit of pydra and release when the PR is merged.