Version 1.1.0

Changed

• Now needs protozero 1.7.0 or above.
• Use protozero::basic_pbf_builder to make buffer type configurable. This allows you to create the final vector tile in any type of buffer, not just std::string. See documentation for details.
• Switch to catch2 for testing.

Fixed

• Examples vtzero-create and vtzero-streets now commit features written.
• Various fixes and small cleanups, mostly based on clang-tidy reports.