Bump symfony/var-exporter from 4.2.8 to 4.2.9
Bump symfony/var-exporter from 4.2.8 to 4.2.9

Bumps [symfony/var-exporter](https://github.com/symfony/var-exporter) from 4.2.8 to 4.2.9.
- [Release notes](https://github.com/symfony/var-exporter/releases)
- [Commits](https://github.com/symfony/var-exporter/compare/v4.2.8...v4.2.9)
ilios/ilios,thecoolestguy/ilios,Trott/ilios,dartajax/ilios,stopfstedt/ilios,Trott/ilios,thecoolestguy/ilios,dartajax/ilios,ilios/ilios,stopfstedt/ilios