Sumneko_lua is not recognized #174

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. ...

Desktop (please complete the following information):

• OS: archlinux
• Terminal: alacritty

** Neovim Version **

• Output of running :version 0.8.2 from inside of neovim:

[mason-lspconfig.nvim] Server "sumneko_lua" is not a valid entry in ensure_installed. Make sure to only pro
vide lspconfig server names.