Update opener requirement from 0.4 to 0.5

Updates the requirements on [opener](https://github.com/Seeker14491/opener) to permit the latest version.
- [Release notes](https://github.com/Seeker14491/opener/releases)
- [Changelog](https://github.com/Seeker14491/opener/blob/master/CHANGELOG.md)
- [Commits](Seeker14491/opener@v0.4.1...v0.5.0)

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

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

Cargo.toml

@@ -47,7 +47,7 @@ log = "0.4.6"
 libgit2-sys = "0.12.18"
 memchr = "2.1.3"
 num_cpus = "1.0"
-opener = "0.4"
+opener = "0.5"
 percent-encoding = "2.0"
 rustfix = "0.6.0"
 semver = { version = "1.0.3", features = ["serde"] }