Minor release. Thanks to @Yancey2023 for submitting fixes for warnings.
- Compile time checks for size of UTF-16 code units
- fix compile warning (https://github.com/nemtrif/utfcpp/pull/133[)](https://github.com/nemtrif/utfcpp/commit/e66f6484fdd2e5c9f1c9120fe040ef5b85e0fc1e)
- tidy code (https://github.com/nemtrif/utfcpp/pull/132[)](https://github.com/nemtrif/utfcpp/commit/0bef8b27854c35c56258c37d4795f34afcb1dc09)