replace `vim.tbl_islist()` with `vim.islist()` after `NVIM v0.10.0-dev-2560`

[charliie-dev]

https://github.com/akinsho/bufferline.nvim/commit/a6ad228f77c276a4324924a6899cbfad70541547 https://neovim.io/doc/user/news.html#news-breaking

for examples: https://github.com/ayamir/nvimdots/blob/d60116fe5edecb373a77e050a92d33884a38b4dd/lua/modules/utils/init.lua#L280-L282

[charliie-dev]

todo

[Jint-lzxy]

I think we could consider postponing this change until the API stabilizes - afaik this and similar APIs have undergone numerous iterations since the initial change, and the synopsis has also experienced incompatible changes (which would render it incompatible even with older nightly builds). Plus since it's only deprecated, imo it's safe to continue using it until v0.10 is released.

[charliie-dev]

I think we could consider postponing this change until the API stabilizes

agree~