fix from_cursor_pos for Neovim after fd1e019

[kmoschcau]

Closes #1429
See: neovim/neovim@fd1e019

I'm not sure how to best achieve backward compatibility here. I can look into doing it via the return values or whether the function throws or not, if you want.

[leiserfg]

There are more instances of get_parser in the codebase, can you make a wrapper for the old api that behaves like the new one and do the replacements?

[kmoschcau]

@leiserfg sure! Do you have a specific spot in the code-base where shims/wrappers like that belong?

[leiserfg]

Just make a file in utils.

[kmoschcau]

@leiserfg Can do. Although I already did have a look around in the meantime. Wouldn't extras/_treesitter.lua be a better fit?

[kmoschcau]

Done. Weirdly enough, call sites in extras/treesitter_postfix.lua and extras/_treesitter.lua were already treating vim.treesitter.get_parser() as if it was the new, non-throwing version.

[L3MON4D3]

Thank you for the PR @kmoschcau, and @leiserfg for handling it 🙏🙏
I'm taking a quick look locally, and will merge ASAP :)

[L3MON4D3]

Okay, I can't get the tests for master running right now, but this change seem correct, and works for 0.7 and 0.9, so I'll take it :)
TY!!!