Bump approx from 0.4.0 to 0.5.0

Bumps [approx](https://github.com/brendanzab/approx) from 0.4.0 to 0.5.0.
- [Release notes](https://github.com/brendanzab/approx/releases)
- [Commits](https://github.com/brendanzab/approx/compare/v0.4.0...v0.5.0)

---
updated-dependencies:
- dependency-name: approx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Cargo.toml

@@ -35,7 +35,7 @@ default-features = false
 features = ["suggestions", "color", "wrap_help"]
 
 [dev-dependencies]
-approx = "0.4"
+approx = "0.5"
 
 [build-dependencies]
 clap = "2"