Re-enable global statusline with mini.statusline

From the README file:

```lua
-- Whether to set Vim's settings for statusline (make it always shown
-- with 'laststatus' set to 2).
-- To use global statusline, set this to `false` and 'laststatus' to 3.
set_vim_settings = true,
```

lua/opdavies/options.lua

@@ -13,6 +13,7 @@ local settings = {
   hidden = false,
   hlsearch = false,
   inccommand = "split",
+  laststatus = 3,
   linebreak = true,
   list = true,
   mouse = "",
@@ -45,7 +46,6 @@ end
 vim.opt.backupdir:remove "." -- keep backups out of the current directory
 vim.opt.clipboard:append "unnamedplus"
 vim.opt.completeopt = { "menu", "menuone", "noinsert", "noselect" }
-vim.opt.laststatus = 3
 vim.opt.listchars:append {
   trail = "·",
 }

plugin/mini.lua

@@ -16,6 +16,7 @@ require("mini.move").setup {}
 require("mini.operators").setup {}
 
 require("mini.statusline").setup {
+  set_vim_settings = false,
   use_icons = false,
 }