Update opener requirement from 0.7 to 0.8

Updates the requirements on [opener](https://github.com/Seeker14491/opener) to permit the latest version.
- [Changelog](https://github.com/Seeker14491/opener/blob/master/CHANGELOG.md)
- [Commits](Seeker14491/opener@v0.7.0...v0.8.1)

---
updated-dependencies:
- dependency-name: opener
  dependency-version: 0.8.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -30,7 +30,7 @@ fs-err = "3"
 glob = "0.3"
 lcov2cobertura = "1.0.1"
 lexopt = "0.3"
-opener = { version = "0.7", default-features = false }
+opener = { version = "0.8", default-features = false }
 regex = { version = "1.3", default-features = false, features = ["perf", "std"] }
 rustc-demangle = { version = "0.1.23", features = ["std"] }
 ruzstd = { version = "0.8", default-features = false, features = ["std"] }