chore(deps): update ark-ec requirement from 0.4.2 to 0.5.0

Updates the requirements on [ark-ec](https://github.com/arkworks-rs/algebra) to permit the latest version.
- [Release notes](https://github.com/arkworks-rs/algebra/releases)
- [Changelog](https://github.com/arkworks-rs/algebra/blob/master/CHANGELOG.md)
- [Commits](arkworks-rs/algebra@v0.4.2...v0.4.2)

---
updated-dependencies:
- dependency-name: ark-ec
  dependency-type: direct:production
...

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

Cargo.toml

@@ -15,5 +15,5 @@ serde = { version = "1.0.205", features = ["derive"] }
 paste = "1.0"
 hex = "0.4"
 rand = "0.8"
-ark-ec = "0.4.2"
+ark-ec = "0.5.0"
 lazy_static = "1.4.0"