Update criterion requirement from 0.4.0 to 0.5.1

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](https://github.com/bheisler/criterion.rs/compare/0.4.0...0.5.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 4007794..a9a5c44 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -102,7 +102,7 @@ tempfile = "3"
 femme = "2.2.1"
 html2text = "0.5.0"
 [dev-dependencies.criterion]
-version = "0.4.0"
+version = "0.5.1"
 features = ["async_tokio"]
 
 [build-dependencies.skeptic]