[Library Manager] Please add "AllThingsTalk WiFi SDK"

[epiller]

Hello,

Please add our library to the Library Manager:
https://github.com/allthingstalk/arduino-wifi-sdk

Thank you!

[epiller]

@cmaglie Any chance to get a rough estimate when this will be published? No rush, I'm just asking so I know when I can publish our platform's updated documentation that points to Library Manager.
Thank you so much!

[cmaglie]

Done, sorry for the long delay