Bump snmalloc-rs from 0.2.28 to 0.3.0

Bumps [snmalloc-rs](https://github.com/SchrodingerZhu/snmalloc-rs) from 0.2.28 to 0.3.0.
- [Release notes](https://github.com/SchrodingerZhu/snmalloc-rs/releases)
- [Changelog](https://github.com/SchrodingerZhu/snmalloc-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/SchrodingerZhu/snmalloc-rs/commits)

---
updated-dependencies:
- dependency-name: snmalloc-rs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -169,7 +169,7 @@ ipnet = { version = "2.3", optional = true }
 mimalloc = { version = "0.1", default-features = false, optional = true }
 tcmalloc = { version = "0.3", optional = true }
 jemallocator = { version = "0.5", optional = true }
-snmalloc-rs = { version = "0.2", optional = true }
+snmalloc-rs = { version = "0.3", optional = true }
 rpmalloc = { version = "0.2", optional = true }
 
 shadowsocks-service = { version = "1.15.0", path = "./crates/shadowsocks-service" }