Support for Neovim 0.9.5 is broken

[jalvesaq]

At least two commands don't work on Neovim 0.9.5: :RConfigShow and :RMapsDesc.

They don't work because the option split = "above" is invalid for vim.api.nvim_open_win() on Neovim 0.9.5.

The change using vim.api.nvim_open_win() was committed on December 27 (almost two months ago, #297, by @kkanden ) and nobody complained. Perhaps, there are not many people using R.nvim with Neovim 0.9.5. So, instead of fixing the code for this old version of Neovim, I suggest that we require Neovim 0.10.4 as the minimal version to run R.nvim...

@hongyuanjia has written the function utils.system() to ensure that R.nvim would work on Neovim 0.9.5 (see #36 and #41). Requiring Neovim 0.10.4, we will be able to use vim.system() and also vim.uv instead of vim.loop.

[PMassicotte]

Perhaps, there are not many people using R.nvim with Neovim 0.9.5. So, instead of fixing the code for this old version of Neovim, I suggest that we require Neovim 0.10.4 as the minimal version to run R.nvim...

I agree. I just installed nvim 0.9.5 for fun and nothing is working. A lot of errors concerning treesitter among others. I am ok to switch for a newer minimum version.