Update sysinfo requirement from 0.28 to 0.29 (#103)

Updates the requirements on [sysinfo](https://github.com/GuillaumeGomez/sysinfo) to permit the latest version.
- [Changelog](https://github.com/GuillaumeGomez/sysinfo/blob/master/CHANGELOG.md)
- [Commits](https://github.com/GuillaumeGomez/sysinfo/commits)

---
updated-dependencies:
- dependency-name: sysinfo
  dependency-type: direct:production
...

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Cargo.toml

@@ -46,7 +46,7 @@ image = "0.24"
 once_cell = "1.9"
 rand_chacha = "0.3"
 sha2 = "0.10"
-sysinfo = "0.28"
+sysinfo = "0.29"
 serde = { version = "1", features = ["derive"] }
 tdn = { version = "0.10", default-features = false, features = ["std"] }
 tdn_did = { version = "0.10" }