Update fastrand requirement from 1.8.0 to 2.0.0 (#573)

Updates the requirements on [fastrand](https://github.com/smol-rs/fastrand) to permit the latest version.
- [Release notes](https://github.com/smol-rs/fastrand/releases)
- [Changelog](https://github.com/smol-rs/fastrand/blob/master/CHANGELOG.md)
- [Commits](smol-rs/fastrand@v1.8.0...v2.0.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

examples/execd/Cargo.toml

@@ -7,7 +7,7 @@ publish = false
 
 [dependencies]
 libcnb.workspace = true
-fastrand = "1.8.0"
+fastrand = "2.0.0"
 
 [dev-dependencies]
 libcnb-test.workspace = true

libcnb-test/Cargo.toml

@@ -14,7 +14,7 @@ include = ["src/**/*", "LICENSE", "README.md"]
 [dependencies]
 bollard = "0.14.0"
 cargo_metadata = "0.15.0"
-fastrand = "1.8.0"
+fastrand = "2.0.0"
 fs_extra = "1.2.0"
 libcnb-data.workspace = true
 libcnb-package.workspace = true

libcnb/Cargo.toml

@@ -21,5 +21,5 @@ thiserror = "1.0.35"
 toml.workspace = true
 
 [dev-dependencies]
-fastrand = "1.8.0"
+fastrand = "2.0.0"
 tempfile = "3.3.0"