fix: populate runtimepath correctly - closes #65

Author: andrewferrier

tests/debugprint.lua

@@ -1,8 +1,10 @@
 vim.o.hidden = true
 vim.o.swapfile = false
 
-vim.cmd("set rtp+=~/.local/share/nvim/site/pack/vendor/start/nvim-treesitter")
-vim.cmd("set rtp+=../nvim-treesitter")
+-- These must be prepended because of this:
+-- https://github.com/nvim-treesitter/nvim-treesitter/issues/3092#issue-1288690088
+vim.opt.runtimepath:prepend("~/.local/share/nvim/site/pack/vendor/start/nvim-treesitter")
+vim.opt.runtimepath:prepend("../nvim-treesitter")
 vim.cmd("runtime! plugin/nvim-treesitter.lua")
 
 local install_parser_if_needed = function(filetype)