There's little to no added value for UTF-8 in this file, while some
editors do cause trouble when editing those files (e.g. adding BOM
on Windows). This just avoids that hassle where we can.

Closes: #1432

Closes: #1430

We have removed the option to add enable/disable/default-enable/default-disable files, so this is no longer an override

Commit 1edc1264 replaced Travis CI with GitHub Actions. These are
configured through the `.github` directory.

Commit 1edc1264 replaced Travis CI with GitHub Actions. Remove the
remaining references to Travis CI.

* Start testing on PHP 8.0

* Update test-framework

* Fix broken unit tests

* Fix query; apparently under PHP8 the query would raise PDOException instead of returning false