Add testing against older clangs on osx#127

Merged

h-vetinari merged 2 commits intoconda-forge:mainfrom h-vetinari:C11

Aug 12, 2023

+16-14

Commits on Aug 12, 2023

MNT: Re-rendered with conda-build 3.26.0, conda-smithy 3.24.1, and conda-forge-pinning 2023.07.29.23.56.43
h-vetinari
committed
test libcxx against old clang builds
h-vetinari
committed