Bump tokio from 0.2.22 to 0.3.5

Bumps [tokio](https://github.com/tokio-rs/tokio) from 0.2.22 to 0.3.5.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-0.2.22...tokio-0.3.5)

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

Author: dependabot-preview[bot]

Cargo.lock

@@ -7,5 +7,5 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-tokio = { version = "0.2", features = ["full"] }
+tokio = { version = "0.3", features = ["full"] }
 oxidizer = { version = "0.2.1", path = "../oxidizer" }

oxidizer-tests/Cargo.toml

@@ -20,7 +20,7 @@ tls-rustls = ["rustls", "tokio-postgres-rustls"]
 [dependencies]
 chrono = "0.4.19"
 async-trait = "0.1.47"
-tokio = { version = "0.2", features = ["full"] }
+tokio = { version = "0.3", features = ["full"] }
 tokio-postgres = { version= "0.5.4", features = ["with-chrono-0_4"]}
 mobc = "0.5"
 barrel = { version = "0.6.5", features = ["pg"] }