Update xmas-elf requirement from 0.8 to 0.9

Updates the requirements on [xmas-elf](https://github.com/nrc/xmas-elf) to permit the latest version.
- [Release notes](https://github.com/nrc/xmas-elf/releases)
- [Commits](https://github.com/nrc/xmas-elf/commits)

---
updated-dependencies:
- dependency-name: xmas-elf
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -18,7 +18,7 @@ edition = "2018"
 
 [dependencies]
 log = { version = "0.4", optional = true }
-xmas-elf = "0.8"
+xmas-elf = "0.9"
 bitflags = "1.2"
 
 [target.'cfg(target_family = "unix")'.dev-dependencies]