[Library Manager] Please add AllThingsTalk LoRaWAN SDK

[vydd]

Hello,

Please add our library to the Library Manager.

https://github.com/allthingstalk/arduino-lorawan-sdk

(Hopefully, it's ok that the latest 3.0.0 tag is not pointing to master - we need to do it this way in order to gracefully sync the docs after the release)

Thanks!

[cmaglie]

done

(Hopefully, it's ok that the latest 3.0.0 tag is not pointing to master - we need to do it this way in order to gracefully sync the docs after the release)

no problem for that