nvim: init: Enable cursorline

A new cursorline option 'number' seems to be available now. This would
be useful compared to the whole line.

nvim/.config/nvim/init.lua

@@ -46,6 +46,8 @@ vim.o.scrolloff      = 999
 vim.o.formatoptions  = "crqn1j"
 vim.o.relativenumber = true
 vim.o.signcolumn     = "yes"
+vim.o.cursorline     = true
+vim.o.cursorlineopt  = "number"
 
 vim.g.python3_host_prog       = '/usr/bin/python3'
 -- Disable providers we do not give a shit about