Update criterion requirement from 0.5.1 to 0.6.0 (#6)

Updates the requirements on [criterion](https://github.com/bheisler/criterion.rs) to permit the latest version.
- [Changelog](https://github.com/bheisler/criterion.rs/blob/master/CHANGELOG.md)
- [Commits](bheisler/criterion.rs@0.5.1...0.6.0)

---
updated-dependencies:
- dependency-name: criterion
  dependency-version: 0.6.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

Cargo.toml

@@ -16,7 +16,7 @@ exclude = [
 image = { version = "0.25.1", optional = true }
 
 [dev-dependencies]
-criterion = { version = "0.5.1", features = ["html_reports"] }
+criterion = { version = "0.6.0", features = ["html_reports"] }
 image = "0.25.1"
 
 [[bench]]