Update snafu requirement from 0.7 to 0.8

Updates the requirements on [snafu](https://github.com/shepmaster/snafu) to permit the latest version.
- [Changelog](https://github.com/shepmaster/snafu/blob/main/CHANGELOG.md)
- [Commits](shepmaster/snafu@0.7.0...0.8.3)

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

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

Cargo.toml

@@ -31,7 +31,7 @@ lzokay-native = "0.1"
 num = "0.4.1"
 object_store = { version = "0.9.0", optional = true }
 prost = { version = "0.11" }
-snafu = "0.7"
+snafu = "0.8"
 snap = "1.1"
 tokio = { version = "1.28", optional = true, features = [
     "io-util",