Remove deprecated nvim-treesitter module support
Fixes #27
@oncomouse I think nvim-treesitter utility modules should be removed too, since they are moving it all to the neovim core
This plugin should only handle installing, updating, and removing parsers and queries
I don't understand why you remove plugin/ module and use setup() function? While your setup() function doesn't even have any customization options.
Your PR will be a breaking change because people will have to modify their config, by adding require('nvim-treesitter-endwise').setup() in order to continue using the plugin. Otherwise, the plugin will not work
plugin/ is built-in feature, code there will be automatically sourced when Neovim startup. So I don't think there is any need for ~~plugin/ (mis typo)~~ setup() function