fix(utils): Added support for nvim-treesitter:main

Author: OXY2DEV

lua/helpview/utils.lua

@@ -9,8 +9,13 @@ utils.parser_installed = function (parser_name)
 	if has_ts == false then
 		--- `nvim-treesitter` not available.
 		return false;
-	elseif parsers.has_parser(parser_name) == true then
-		--- Parser installed via `nvim-treesitter`.
+	elseif parsers.has_parser and parsers.has_parser(parser_name) == true then
+		-- Parser installed via `nvim-treesitter`.
+		-- NOTE: This only works for `master` branch.
+		return true;
+	elseif parsers[parser_name] then
+		-- Parser installed via `nvim-treesitter`.
+		-- NOTE: This only works for `main` branch.
 		return true;
 	elseif pcall(vim.treesitter.query.get, parser_name, "highlights") ~= nil then
 		--- Parser installed manually.