Suggestion: global config store directory change

[tsuyoshicho]

suggestion

This change are breaking.

g:lsp_settings_global_settings_dir
      $HOME/.local/share/vim-lsp-settings (Non-Windows)
        -> ../.local/etc/... ?
      $XDG_DATA_HOME/vim-lsp-settings ($XDG_DATA_HOME defined Non-Windows)
        -> $XDG_CONFIG_HOME/

Windows %LOCALAPPDATA% use for setting and data normaly. But non-windows .local/share same above? It can be said that $XDG_DATA_HOME is different, XDG Spec. config file store to $XDG_CONFIG_HOME