Add Swisscom SMS Channel

[wapacro]

Hey there

I'm using Swisscom's SMS API in a project and would like to share the code for the Laravel Notification integration. Hopefully someone can use it and profit from my work 😄.

I tried to add the forked channels repo as a remote and do a pull request, but it doesn't seem to work as expected. Guess I'm doing something wrong?

Anyways, the Swisscom channel code is ready for review at https://github.com/wapacro/swisscom-sms-channel.

[atymic]

Thanks for the PR. Yes, we need to update the instructions, will add a issue for that.