v0.3.3-alpha

• BREAKING changes: zsv_column_count -> zsv_cell_count; row -> row_handler; cell -> cell_hander, zsv_parse_string -> zsv_parse_bytes

add pull parsing via zsv_next_row()
add serialize option -p/--position
add echo --overwrite option using sqlite3 db source
performance enhancements for wasm build
performance enhancements if no AVX2 and/or AVX
fix potential multi-span header issue in wasm build
use bundled jq, remove jq opt-out
update configure & Makefiles to properly handle wider range of architectures
update node package
fix zsv_parse_string() bug if chunk > buffsize
add more example code and documentation
update zsv_strencode to add optional callback invoked on bad utf8 (#66)
add --compact option to 2json
fix tiny mem leak
change zsv_with_default_opts() to ensure max_row_size and max_columns are always 0
add prop command for handling row offsets and multi-row-span headers
skip blank leading rows by default; add generic option to disable
remove libwinpthread dependency on mingw64/windows build with jq
misc bug fixes