chore(fmt): format using stylua

Also fixed something in .stylua.toml that may cause stylua to fail, by
the way

lua/outline/float.lua

@@ -69,7 +69,13 @@ function Float:open(lines, hl, title, indent)
     self.ns = vim.api.nvim_create_namespace('OutlineHelp')
     for _, h in ipairs(hl) do
       if _G._outline_nvim_has[11] then
-        vim.hl.range(self.bufnr, self.ns, h.name, { h.line, h.from + indent }, { h.line, (h.to ~= -1 and h.to + indent) or -1 })
+        vim.hl.range(
+          self.bufnr,
+          self.ns,
+          h.name,
+          { h.line, h.from + indent },
+          { h.line, (h.to ~= -1 and h.to + indent) or -1 }
+        )
       else
         ---@diagnostic disable-next-line:deprecated
         vim.api.nvim_buf_add_highlight(