message: Provide a way to compile with c++20
  This allows us to verify if we're ready for the next c++
  version.
diff: @@ -98,6 +98,11 @@ case "$MODE" in
  bazel build --keep_going $BAZEL_OPTS :install-binaries
  ;;
  + compile20)
  + # Compile with C++ 20 to make sure to be compatible with the next version.
  + bazel build --keep_going $BAZEL_OPTS --cxxopt=-std=c++20 :install-binaries
  + ;;
  +
  smoke-test)
  $(dirname $0)/smoke-test.sh
  ;;
  