Switching to git because it needs a submodule dependency.

Summarized Changelog:

• Fix/add support for Lua 5.4
• fs_{read,write}: make offset argument optional and default it to -1
• Add udp_set_source_membership binding + improve udp_set_membership
• Fix garbage collection-related memory bug with threads
• Fix args potentially being garbage collected before use in luv_spawn
• Fix memory leaks
• Optimize data exchange between threads

Full changelogs available here.

Build neovim using this version