build(deps): update mio requirement from 0.5 to 1.0

Updates the requirements on [mio](https://github.com/tokio-rs/mio) to permit the latest version.
- [Release notes](https://github.com/tokio-rs/mio/releases)
- [Changelog](https://github.com/tokio-rs/mio/blob/master/CHANGELOG.md)
- [Commits](tokio-rs/mio@v0.5.0...v1.0.0)

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

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

packages/dht/Cargo.toml

@@ -22,7 +22,7 @@ util = { path = "../util" }
 
 crc = "3"
 log = "0.4"
-mio = "0.5"
+mio = "1.0"
 rand = "0.8"
 chrono = "0.4"
 error-chain = "0.12"