Travis CI not triggering

For some reason, my Travis CI instance does not trigger.
This is my configuration file - https://github.com/reikdas/cling/blob/master/.travis.yml

Although I just opened a pull request (and many in the last few months) - https://github.com/reikdas/cling/pull/8, on travis-ci.org the last build is shown as 5 months ago - https://travis-ci.org/github/reikdas/cling/pull_requests

I would really appreciate any help!

https://travis-ci.org/github/reikdas/cling/requests shows that your configuration does not create any job.

You are excluding all jobs here:

Imprint