* Add zstd support
* Add zstd to CI tests
* Use use zstd cmake target instead of ZSTD. Use cmake variable for found packages
* Add missing comment for HTTPLIB_REQUIRE_ZSTD
* Fix test.yaml rebase error
* Use zstd::libzstd target
* Add include and library paths to ZSTD args
* Run clang-format
* Add zstd to httplibConfig.cmake.in