nvim: after/ftplugin/json: Lint on save

While at it, use eslint and not eslint_d for javascript
and typescript.

nvim/.config/nvim/after/ftplugin/json.lua

@@ -1 +1,8 @@
 vim.keymap.set('n', 'gq', ":%!jq '.'<CR>", { noremap=true, silent=true, buffer=0 })
+
+vim.api.nvim_create_autocmd({ "BufWritePost" }, {
+  buffer   = 0,
+  callback = function()
+    require("lint").try_lint()
+  end,
+})

nvim/.config/nvim/after/plugin/nvim-lint.lua

@@ -8,12 +8,13 @@ nvim_lint.linters_by_ft = {
   fish       = { 'fish' },
   go         = { 'revive' },
   haskell    = { 'hlint' },
-  javascript = { 'eslint_d' },
+  javascript = { 'eslint' },
+  json       = { 'jq' },
   lua        = { 'luacheck' },
   markdown   = { 'vale' },
   sh         = { 'shellcheck' },
   systemd    = { 'systemd-analyze' },
-  typescript = { 'eslint_d' },
+  typescript = { 'eslint' },
   yaml       = { 'yamllint' },
 }