Bump sysinfo from 0.15.9 to 0.16.4 (#22)

Bumps [sysinfo](https://github.com/GuillaumeGomez/sysinfo) from 0.15.9 to 0.16.4.
- [Release notes](https://github.com/GuillaumeGomez/sysinfo/releases)
- [Commits](https://github.com/GuillaumeGomez/sysinfo/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -23,7 +23,7 @@ serde = { version = "1", features = [ "derive" ] }
 serde_json = "1"
 structopt = "0.3"
 subtle-encoding = { version = "0.5", features = [ "bech32-preview" ] }
-sysinfo = { version = "0.15", optional = true }
+sysinfo = { version = "0.16", optional = true }
 tempfile = "3"
 tendermint = { version = "0.17" }
 thiserror = "1"