PENDING changes

## from changes-20210321-20210406.txt
- all tabbed & tab widget functions

## from changes-20210406-20210410.txt
bindgen add:
- [x] ncdirect_stream

## from changes-20120518-20210603.txt …

- [x] ncdirect_styles
- [x] ncdirect_supported_styles

- [x] ncplane_erase_region

- [x] nccell_width

- [x] notcurses_cursor_yx

- [x] ncinput_nomod_p