Bump symfony/test-pack from 1.0.7 to 1.0.8 in /symfony

Bumps [symfony/test-pack](https://github.com/symfony/test-pack) from 1.0.7 to 1.0.8.
- [Release notes](https://github.com/symfony/test-pack/releases)
- [Commits](symfony/test-pack@v1.0.7...v1.0.8)

---
updated-dependencies:
- dependency-name: symfony/test-pack
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]