In our downstream project, we have two dependencies: solidity and spdlog.
Both of them depend on fmtlib. Unfortunately, the versions of fmtlib they
use do not match, which leads to compilation failure.
The issue arises because spdlog attempts to use solidity's fmtlib, but the
specific version (v8.0.1) has a bug. Ref: https://github.com/gabime/spdlog/issues/2142
While we could keep this change in our own fork, we believe it would
be worthwhile to contribute it back to the upstream since spdlog is a
very popular logging library.
Signed-off-by: Jun Zhang <jun@junz.org>