CI: Remove travis dependency

[svrooij]

I want to migrate away from travis, because it isn't the fastest solution. The github actions finish way sooner.

Github action should be changed to:

• Run semantic release (check if it needs a new version and then publish it)
• Create a special dev release (from the development branch)
• Send a trigger to sonos2mqtt action to update the dependency (new action)

[svrooij]

Fixed in https://github.com/svrooij/node-sonos-ts/pull/61