cargo: bump quick-xml from 0.18.1 to 0.22.0

Bumps [quick-xml](https://github.com/tafia/quick-xml) from 0.18.1 to 0.22.0.
- [Release notes](https://github.com/tafia/quick-xml/releases)
- [Changelog](https://github.com/tafia/quick-xml/blob/master/Changelog.md)
- [Commits](https://github.com/tafia/quick-xml/compare/v0.18.1...v0.22.0)

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

Cargo.toml

@@ -51,7 +51,7 @@ once_cell = "1.4.1"
 percent-encoding = "2.0"
 pgp = { version = "0.7.0", default-features = false }
 pretty_env_logger = { version = "0.4.0", optional = true }
-quick-xml = "0.18.1"
+quick-xml = "0.22.0"
 r2d2 = "0.8.9"
 r2d2_sqlite = "0.18.0"
 rand = "0.7.0"