feat(ts)!: use upstream treesitter implementation (#2499)

bumps minimum required neovim version to 0.9, see `help telescope.changelog-2499`

lua/telescope/previewers/utils.lua

@@ -3,10 +3,6 @@ local ts_utils = require "telescope.utils"
 local strings = require "plenary.strings"
 local conf = require("telescope.config").values
 
-local has_ts, _ = pcall(require, "nvim-treesitter")
-local _, ts_configs = pcall(require, "nvim-treesitter.configs")
-local _, ts_parsers = pcall(require, "nvim-treesitter.parsers")
-
 local Job = require "plenary.job"
 
 local utils = {}
@@ -131,37 +127,14 @@ utils.regex_highlighter = function(bufnr, ft)
   return false
 end
 
-local treesitter_attach = function(bufnr, ft)
-  local lang = ts_parsers.ft_to_lang(ft)
-  if not ts_configs.is_enabled("highlight", lang, bufnr) then
-    return false
-  end
-
-  local config = ts_configs.get_module "highlight"
-  vim.treesitter.highlighter.new(ts_parsers.get_parser(bufnr, lang))
-  local is_table = type(config.additional_vim_regex_highlighting) == "table"
-  if
-    config.additional_vim_regex_highlighting
-    and (not is_table or vim.tbl_contains(config.additional_vim_regex_highlighting, lang))
-  then
-    vim.api.nvim_buf_set_option(bufnr, "syntax", ft)
-  end
-  return true
-end
-
 -- Attach ts highlighter
 utils.ts_highlighter = function(bufnr, ft)
-  if not has_ts then
-    has_ts, _ = pcall(require, "nvim-treesitter")
-    if has_ts then
-      _, ts_configs = pcall(require, "nvim-treesitter.configs")
-      _, ts_parsers = pcall(require, "nvim-treesitter.parsers")
+  if has_filetype(ft) then
+    local lang = vim.treesitter.language.get_lang(ft)
+    if lang and ts_utils.has_ts_parser(lang) then
+      return vim.treesitter.start(bufnr, lang)
     end
   end
-
-  if has_ts and has_filetype(ft) then
-    return treesitter_attach(bufnr, ft)
-  end
   return false
 end