Request Travis Credits and/or migrate to another CI provider, e.g. GitHub actions

[fingolfin]

On https://travis-ci.com/github/JuliaCI/CoverageTools.jl I now see the dreaded message

Builds have been temporarily disabled for public repositories due to a negative credit balance. Please go to the Plan page to replenish your credit balance or alter your Consume paid credits for OSS setting.

For another open source project, I successfully asked Travis for some additional credits, but it took > 1 week (and they only gave me part of what I asked for, with a promise that there might be more but that they need to "escalate" it to someone higher up... uhu).

Instead it may make more sense to switch this repo and others under JuliaCI to another CI provider. I'd suggest GitHub Actions.