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

(cherry picked from commit 4ce4c737)

(cherry picked from commit acbbef76)

(cherry picked from commit 879588a5)

(cherry picked from commit 3a707ec6)

Co-authored-by: Tim van Dijen <tvdijen@gmail.com>

Closes: #1411
(cherry picked from commit 306b8281)

Bumps [ini](https://github.com/isaacs/ini) from 1.3.5 to 1.3.8.
- [Release notes](https://github.com/isaacs/ini/releases)
- [Commits](https://github.com/isaacs/ini/compare/v1.3.5...v1.3.8

)

Signed-off-by: dependabot[bot] <support@github.com>
(cherry picked from commit 1f57570d)

Merge branch 'simplesamlphp-1.19' of https://github.com/simplesamlphp/simplesamlphp into simplesamlphp-1.19

(cherry picked from commit 1a4733bc)

Bumps [highlight.js](https://github.com/highlightjs/highlight.js) from 10.1.2 to 10.4.1.
- [Release notes](https://github.com/highlightjs/highlight.js/releases)
- [Changelog](https://github.com/highlightjs/highlight.js/blob/master/CHANGES.md)
- [Commits](https://github.com/highlightjs/highlight.js/compare/10.1.2...10.4.1

)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Restore symfony 5 support