JuliaInterop
Time-sensitive: migrate from Travis-CI.org to Travis-CI.com
Currently, RCall.jl uses Travis-CI.org.
Travis-CI.org will be shut down on December 31, 2020: https://mailchi.mp/3d439eeb1098/travis-ciorg-is-moving-to-travis-cicom?e=%5BUNIQID%5D
Therefore, before then, we need to migrate from Travis-CI.org to Travis-CI.com.
The migration needs to be performed by a user that is an owner of the relevant GitHub organization, which in this case is JuliaInterop.
Instructions for migration are available here: https://docs.travis-ci.com/user/migrate/open-source-repository-migration
Even worse: Travis as a whole seems to drastically cutting support for FOSS, with several reports indicating that they won't even give credits when asking nicely (e.g. here), so we should probably migrate to GitHub Actions. The tricky bit for RCall is having both R and Julia available in the environment, but I have a mostly working solution as part of JellyMe4. I'll open a PR here in a few days with the fix: the basic setup is pretty straightforward, but I'll probably need help getting Conda and Coveralls working perfectly. Note that my testing so far has indicated that the old GLIBCXX issue (#339) is particularly tricky to solve on GH Actions, but it is very easy to set up one CI that does Windows, Mac and Linux once you get that solved.
