bring back `0.9.0-dev.727+aad459836`
the newer version fails for darwin-amd64 target.
switch back to dev version
0.8.1 are cherry picks, turns out.
upgrade zig, add aarch64
- upgrade zig to 0.8.1
- add preliminary aarch64 support. I don't have an aarch64 machine to
test this with, so landing as-is. However, this will be used as an
upstream repository, so hopefully the issues, if any, will flow in.
shell strict mode in .envrc
download a verified version of bazelisk
register another high-severity issue
bump toolchain version in README
add another point to the known issues
unregister default toolchains; update README