What's Changed

• adding char bit check (pedantic) by @lemire in #2316
• Enabling PPC64 (was always disabled by default) by @lemire in #2320
• let us be more careful with concepts, we require __cpp_concepts >= 201907L and check for old versions of Apple clang by @lemire in #2321

Full Changelog: v3.11.3...v3.11.4