Update memmap2 requirement from 0.6 to 0.9

Updates the requirements on [memmap2](https://github.com/RazrFalcon/memmap2-rs) to permit the latest version.
- [Changelog](https://github.com/RazrFalcon/memmap2-rs/blob/master/CHANGELOG.md)
- [Commits](RazrFalcon/memmap2-rs@v0.6.0...v0.9.4)

---
updated-dependencies:
- dependency-name: memmap2
  dependency-type: direct:production
...

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

ezlog-core/Cargo.toml

@@ -20,7 +20,7 @@ android_logger = ["log","dep:android_logger"]
 
 [dependencies]
 libc = "0.2"
-memmap2 = "0.6"
+memmap2 = "0.9"
 log = { version = "0.4", optional = true }
 byteorder = "1"
 flate2 = "1.0"