Update wasi-common requirement from 16.0.0 to 20.0.0

Updates the requirements on [wasi-common](https://github.com/bytecodealliance/wasmtime) to permit the latest version.
- [Release notes](https://github.com/bytecodealliance/wasmtime/releases)
- [Changelog](https://github.com/bytecodealliance/wasmtime/blob/main/docs/WASI-some-possible-changes.md)
- [Commits](bytecodealliance/wasmtime@v16.0.0...v20.0.0)

---
updated-dependencies:
- dependency-name: wasi-common
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -50,4 +50,4 @@ tokio = { version = "1.35.1", features = ["fs", "macros", "net", "process"] }
 tokio-util = "0.7.10"
 wasmtime = "16.0.0"
 wasmtime-wasi = "16.0.0"
-wasi-common = "16.0.0"
+wasi-common = "20.0.0"