`basic_pbf_writer::add_bool` with buffer of non-`char` element type does not compile.

[mikaellindemann]

I have been mostly able to support std::vector<std::byte> as buffer in basic_pbf_builder<std::vector<std::byte>> by implementing a custom buffer_customization<std::vector<std::byte>>.

However, when calling basic_pbf_builder::add_bool(tag, true) the compiler fails because std::vector<std::byte>::push_back(char value) does not exist.

Is it possible to change this line in void basic_pbf_writer<TBuffer>::add_bool(pbf_tag_type tag, bool value) from:

        m_data->push_back(static_cast<char>(value));

to

        buffer_customization<TBuffer>::push_back(m_data, static_cast<char>(value));

to allow support for other element types than char?