4.0.10

This PR has an important behaviour change for sending SMS:
You will now not longer receive a PHP warning if you try and send a GSM-7 charset as Unicode.
You -will- get a logged warning (if you have set a PSR-3 compatible logger when creating the client) if you try and send a unicode charset text that could be set to GSM-7.

We do not want to stop you sending a message - it's your choice what encoding you want to use, but we will warn you if not correct.

GSM-7 is still the default, since unicode creates longer SMS messages that cost more.

What's Changed

• Fix auth handler for Numbers - autoclosed by @SecondeJK in #383
• Change warning to logger for GSM-7 by @SecondeJK in #382

Full Changelog: 4.0.9...4.0.10