Update async-session requirement from 2.0.1 to 3.0.0

Updates the requirements on [async-session](https://github.com/http-rs/async-session) to permit the latest version.
- [Release notes](https://github.com/http-rs/async-session/releases)
- [Commits](http-rs/async-session@v2.0.1...v3.0.0)

---
updated-dependencies:
- dependency-name: async-session
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -16,7 +16,7 @@ version = "0.20.1"
 features = ["aio", "async-std-comp"]
 
 [dependencies]
-async-session = "2.0.1"
+async-session = "3.0.0"
 
 [dev-dependencies]
 async-std = { version = "1.9.0", features = ["attributes"] }