Add true streaming #91

Job	Run time
windows (lua53, lua5.3, 5.3, /mingw64/include/lua5.3/)	2m 47s
unix (5.1, ubuntu-latest)	58s
windows (lua, lua, 5.4, /mingw64/include/)	2m 51s
unix (5.1, macos-latest)	2m 20s
windows (luajit, luajit, 5.1, /mingw64/include/luajit-2.1/)	2m 46s
unix (5.2, ubuntu-latest)	1m 21s
unix (5.2, macos-latest)	2m 23s
unix (5.3, ubuntu-latest)	2m 13s
unix (5.3, macos-latest)	2m 1s
unix (5.4.7, ubuntu-latest)	1m 12s
unix (5.4.7, macos-latest)	2m 25s
unix (luajit-openresty, ubuntu-latest)	1m 5s
unix (luajit-openresty, macos-latest)	3m 49s
	28m 11s

Provide feedback