Bump xchart from 3.5.2 to 3.5.4
Bump xchart from 3.5.2 to 3.5.4

Bumps [xchart](https://github.com/knowm/XChart) from 3.5.2 to 3.5.4.
- [Release notes](https://github.com/knowm/XChart/releases)
- [Commits](https://github.com/knowm/XChart/compare/xchart-3.5.2...xchart-3.5.4)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
douggie/XChange