Bump biscuit from 0.5.0-beta1 to 0.5.0-beta2

Bumps [biscuit](https://github.com/lawliet89/biscuit) from 0.5.0-beta1 to 0.5.0-beta2.
- [Release notes](https://github.com/lawliet89/biscuit/releases)
- [Changelog](https://github.com/lawliet89/biscuit/blob/master/CHANGELOG.md)
- [Commits](lawliet89/biscuit@v0.5.0-beta1...v0.5.0-beta2)

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 @@ futures = "0.3.5"
 tokio = { version = "0.2.21", features = ["full"] }
 warp = "0.2.5"
 http-api-problem = { version = "0.17.0", features = ["with-warp"] }
-biscuit = "0.5.0-beta1"
+biscuit = "0.5.0-beta2"
 argonautica = "0.2.0"
 sqlx = { version = "0.3.5", default-features = false, features = [ "runtime-tokio", "macros", "postgres", "uuid", "chrono", "json" ] }
 redis = { version = "0.17.0", default-features = false, features = [ "tokio-rt-core" ]}