0.27.2 installs xtensor.json to a non-default, not-modifiable location #2971

Hi! 👋

I'm packaging this project for Arch Linux. When trying to upgrade to 0.27.2, I noticed, that now the file /usr/etc/xeus-cpp/tags.d/xtensor.json is installed, as per:

However, this is a non-standard location and I'm wondering where it should actually go.

Do you support reading this file from the vendor location (/usr) only? If so, it should likely go to e.g. /usr/share/xeus-cpp/tags.d/xtensor.json instead.
If you (also) support an administrator of a system making modifications to that file (if that makes sense at all), the file should (also) be installable (by passing relevant options to cmake) to /etc/xeus-cpp/tags.d/xtensor.json.

In general, in this case it depends on whether administrators should be making overrides to this file at all.
If not, always choose a location in /usr/share/ (or /usr/lib/).
If yes, please also support installation to /etc/.

Currently, I'm blocked from updating this package, so your input would be most valuable! Thanks 🙏