Update criterion requirement from 0.3 to 0.4

Updates the requirements on [criterion](https://github.com/bheisler/criterion.rs) to permit the latest version.
- [Release notes](https://github.com/bheisler/criterion.rs/releases)
- [Changelog](https://github.com/bheisler/criterion.rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/bheisler/criterion.rs/compare/0.3.0...0.3.6)

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

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

sv-parser/Cargo.toml

@@ -35,7 +35,7 @@ sv-parser-syntaxtree = {version = "^0.12.1", path = "../sv-parser-syntaxtree"}
 
 [dev-dependencies]
 structopt = "0.3.2"
-criterion = "0.3"
+criterion = "0.4"
 enquote   = "1.0"
 
 [[bench]]