fix(lazygit): allow passing dictionary as yaml array item

[Silzinc]

Certain configuration options expect an array of dictionaries, e.g. to use a different git pager. Currently, the YAML writer does not support this. Such a configuration is now possible:

lazygit = {
  config = {
    git = { pagers = { { externalDiffCommand = "difft --color=always --display=inline" } } },
  },
}