Bump tokio from 1.19.2 to 1.20.2

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.19.2 to 1.20.2.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.19.2...tokio-1.20.2)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -11,7 +11,7 @@ serde = "1.0.143"
 tempdir = "0.3.7"
 snafu = "0.6.10"
 log = "0.4.17"
-tokio = { version = "1.19.2", features = [
+tokio = { version = "1.20.2", features = [
     "macros",
     "time",
     "process",