Add option for dynamic channels

[kamerat]

Fixes #13

• Added a way to add dynamic channels.
• Fixed better checks for correct channel input
• Moved beforeDestroy to mounted as a programmatic listener to cut down on validation code
• Refactored some pre ES6 function declarations to arrow functions (there was a mix of both):
  function () {...} -> () => {...}

[happyDemon]

thanks for the PR, I'll check things out when I get home and get a build ready

[kamerat]

Hey, @happyDemon! Sorry if I'm bothering you with this.
Do you have some time to spare to review the PR? :)
Have a nice easter, my dude. 🐣

[wardy484]

😅 I was about to create a PR for this extact thing. 👍 Would be great if this was merged.

[kamerat]

Closing due to inactivity ⌚