Thanks, Volker, for preparing 9.3.rc0 and .rc1.
As the GH Actions run at
https://github.com/sagemath/sage/actions/runs/699525589 shows, there are
still various serious issues that need to be fixed, in particular so that
we do not have regressions in platform support compared to the previous
As always, you can get the latest beta version from the "develop" git
branch. Alternatively, the self-contained source tarball is at
http://www.sagemath.org/download-latest.html
a89f81d778 (tag: 9.3.rc1, trac/develop) Updated SageMath version to 9.3.rc1
6e084f9dba Trac #31521: numpy build
