Fix formatting via eslint on save in neovim

When I saved files in my eslint-formatted projects I was wondering about
slight differences between the results of running `eslint --fix` vs. the
autoamtic formatting when I save a file in neovim.

As it turned out I ran the wrong command indeed. This changes fixes that
by simply calling the correct command on save. Note that this looks
"bigger" but it's actually a copy of the built-in `LspEslintFixAll` of
neovim.

Reference: 1a6d692067/doc/configs.md (eslint)
Reference: 89fd0361b3/lsp/eslint.lua (L92-L104)

.config/nvim/lua/plugins/lsp.lua

@@ -77,9 +77,15 @@ return {
 					group = augroup,
 					buffer = bufnr,
 					callback = function()
-						if vim.bo.filetype == "typescript" then
-							vim.lsp.buf.format()
-						end
+						client:request_sync("workspace/executeCommand", {
+							command = "eslint.applyAllFixes",
+							arguments = {
+								{
+									uri = vim.uri_from_bufnr(bufnr),
+									version = vim.lsp.util.buf_versions[bufnr],
+								}
+							}
+						})
 					end,
 				})
 			end,