Bump simplepie/simplepie from 1.5.5 to 1.5.6
Bump simplepie/simplepie from 1.5.5 to 1.5.6

Bumps [simplepie/simplepie](https://github.com/simplepie/simplepie) from 1.5.5 to 1.5.6.
- [Release notes](https://github.com/simplepie/simplepie/releases)
- [Changelog](https://github.com/simplepie/simplepie/blob/master/CHANGELOG.md)
- [Commits](https://github.com/simplepie/simplepie/compare/1.5.5...1.5.6)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
j0k3r/f43.me,j0k3r/f43.me,j0k3r/f43.me