Ajoute la gem vscode-langservers-extracted pour nvim

Peut être utilisé dans nvim pour améliorer la coloration, la navigation
et la completion du code javascript

Configuration :

```
local capabilities = require('cmp_nvim_lsp').default_capabilities()
local lsp_config = require('lspconfig')
local servers = {
    eslint = {
      cmd = { "node_modules/vscode-langservers-extracted/bin/vscode-eslint-language-server", "--stdio" },
      on_attach = function(client, bufnr)
          vim.api.nvim_create_autocmd("BufWritePre", {
              buffer = bufnr,
              command = "EslintFixAll",
          })
      end,
    },
}
for server, config in pairs(servers) do
    -- Merge capabilities with server-specific config
    config.capabilities = capabilities
    lsp_config[server].setup(config)
end
```

Author: etienneCharignon

package-lock.json

@@ -62,6 +62,7 @@
     "sass": "^1.45",
     "sass-loader": "^12.x",
     "style-loader": "^2.0",
+    "vscode-langservers-extracted": "^4.10.0",
     "vue-loader": "^16.0.0",
     "webpack-dev-server": "^4.7",
     "webpack-node-externals": "^2.5",