Tests cannot run without built assets, and we want
exactly the matching assets. This is not a cache.

This replace calls of String#match? with rails Regex#match?
This follows the same idea used to keep Rails 5.2 compatible with Ruby
2.2.2 in https://github.com/rails/rails/pull/32973

* Disable simplecov on CircleCI

* Remove --format progress

* Port travis_retry for CI

* Add license