Unable to build `backward-stacktrace` on MacOS

[onelxj]

Building backward-stacktrace fails on MacOS arm64 with:

In file included from external/com_github_3rdparty_bazel_rules_backward_cpp_stacktrace/backward-stacktrace.h:3:
external/com_github_backward_cpp/backward.hpp:1013:27: error: expected ';' after expression
      unw_getcontext(&ctx)
                          ^
                          ;
external/com_github_backward_cpp/backward.hpp:1016:19: error: no member named 'uc_mcontext' in 'unw_context_t'
          if (ctx.uc_mcontext->__ss.__eip ==
              ~~~ ^
external/com_github_backward_cpp/backward.hpp:1017:32: error: unknown type name 'greg_t'
              reinterpret_cast<greg_t>(error_addr())) {
                               ^
external/com_github_backward_cpp/backward.hpp:1018:13: error: no member named 'uc_mcontext' in 'unw_context_t'
        ctx.uc_mcontext->__ss.__eip = ctx.uc_mcontext->__ss.__esp;
        ~~~ ^
external/com_github_backward_cpp/backward.hpp:1018:43: error: no member named 'uc_mcontext' in 'unw_context_t'
        ctx.uc_mcontext->__ss.__eip = ctx.uc_mcontext->__ss.__esp;
                                      ~~~ ^
external/com_github_backward_cpp/backward.hpp:1021:40: error: no member named 'uc_mcontext' in 'unw_context_t'
          reinterpret_cast<void *>(ctx.uc_mcontext->__ss.__eip);

Consider updating backward library (seems the version of backward-cpp we are using doesn't support MacOS arm).