CI has been broken for a long time

[tjlaboss]

Since June 15th, 2021, the building on travis-ci.org is ceased. Please use travis-ci.com from now on.

Now, Travis is no longer free after a brief trial period. It would be worth investigating alternatives, such as Circle CI.

[MicahGale]

Travis is longer free.

Thanks @tjlaboss!

Also Github Actions may be another option.

[GiudGiud]

Github actions seems to work well for OpenMC
We could get away with the free option of a 4 core machine and just a slow CI ?

[tjlaboss]

That would be acceptable IMO