v0.12.6

• Changes
  • Remove support for upgrading 5+ year old configurations. These probably
    weren't used much at all given how early in VintageNetWiFi's history they
    were around. If you're upgrading a device that has not been updated in 5
    years, please review differences or you may lose an existing WiFi config.
  • Add docs on forcing the WiFi frequency used when configuring AP mode. Thanks
    to Ray Chang for this update.