Fix linters (#19)

* fix selene

* chore(ci): pin stylua version

.github/workflows/ci.yml

···
       - uses: JohnnyMorganz/stylua-action@1.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
+          version: 0.14.0
           args: --check .
 
   lint:

lua/gopher/comment.lua

···
   local comment, ns = nil, nil
 
   ns = ts_utils.get_package_node_at_pos(row, col)
-  if ns ~= nil and ns ~= {} then
+  if ns ~= nil then
     comment = "// Package " .. ns.name .. " provides " .. ns.name
     return comment, ns
   end
 
   ns = ts_utils.get_struct_node_at_pos(row, col)
-  if ns ~= nil and ns ~= {} then
+  if ns ~= nil then
     comment = "// " .. ns.name .. " " .. ns.type .. " "
     return comment, ns
   end
 
   ns = ts_utils.get_func_method_node_at_pos(row, col)
-  if ns ~= nil and ns ~= {} then
+  if ns ~= nil then
     comment = "// " .. ns.name .. " " .. ns.type .. " "
     return comment, ns
   end
 
   ns = ts_utils.get_interface_node_at_pos(row, col)
-  if ns ~= nil and ns ~= {} then
+  if ns ~= nil then
     comment = "// " .. ns.name .. " " .. ns.type .. " "
     return comment, ns
   end

lua/gopher/struct_tags.lua

···
 local function modify(...)
   local fpath = vim.fn.expand "%" ---@diagnostic disable-line: missing-parameter
   local ns = ts_utils.get_struct_node_at_pos(unpack(vim.api.nvim_win_get_cursor(0)))
-  if ns == nil or ns == {} then
+  if ns == nil then
     return
   end