You should realize that Travis has announced they will not be giving free CI to open source any longer. You can move your builds to travis-ci.com, but that will only give you a temporary reprieve.
For those of you who have been building on public repositories (on travis-ci.com, with no paid subscription), we will upgrade you to our trial (free) plan with a 10K credit allotment (which allows around 1000 minutes in a Linux environment).
… When your credit allotment runs out - we’d love for you to consider which of our plans will meet your needs.
Yes, I know we thought the new owners of travis said they planned to keep supporting open source. And that an FAQ still up says “Travis CI will continue to offer a free tier for public or open-source repositories on travis-ci.com”.
(It also says “we’re making a number of changes to the travis-ci.org infrastructure to ensure the service will remain as reliable and available to you as it always has been until the migration is completed”, which Travis staff in forums are clarifying is not the case?)
Either plans changed, or we misunderstood what they meant by “supporting open source” or “offering a free tier”. Travis has announced that the only “free tier” for open source or anyone else will be a trial plan with 1000 minutes (not a month; total).