Update hashlink requirement from 0.7 to 0.8 (#40)

Updates the requirements on [hashlink](https://github.com/kyren/hashlink) to permit the latest version.
- [Release notes](https://github.com/kyren/hashlink/releases)
- [Changelog](https://github.com/kyren/hashlink/blob/master/CHANGELOG.md)
- [Commits](djc/hashlink@v0.7.0...v0.8.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.toml

@@ -33,7 +33,7 @@ modern-full = [
 
 [dependencies]
 # time = { version = "0.3.2", features = ["formatting", "parsing"], optional = true }
-hashlink = "0.7"
+hashlink = "0.8"
 chrono = { version = "0.4", optional = true }
 serde_json = { version = "1.0", optional = true }
 csv = { version = "1.1", optional = true }