I decided to try out CircleCI. Their "next-gen" images are based on Ubuntu, their legacy are Debian but you are discouraged from using them. This PR drops the Debian targets for that reason. Not an excuse, but looking at the most recent Travis build these were already failing.
Another alternative would be to use Github Actions. I haven't looked much into that except that I noticed their default runners also only carry Ubuntu, not Debian.
When I noticed my CI wasn't working I discovered Travis discontinued their Open Source free plans :sadpanda:
Background:
I decided to try out CircleCI. Their "next-gen" images are based on Ubuntu, their legacy are Debian but you are discouraged from using them. This PR drops the Debian targets for that reason. Not an excuse, but looking at the most recent Travis build these were already failing.
Another alternative would be to use Github Actions. I haven't looked much into that except that I noticed their default runners also only carry Ubuntu, not Debian.