fix(deps): update rust crate tun2 to v4

Author: renovate[bot]

Cargo.lock

@@ -186,7 +186,7 @@ flate2 = { version = "1.0", optional = true }
 brotli = { version = "7.0", optional = true }
 zstd = { version = "0.13", optional = true }
 
-tun2 = { version = "3.1", optional = true, default-features = false, features = [
+tun2 = { version = "4.0", optional = true, default-features = false, features = [
     "async",
 ] }
 etherparse = { version = "0.16", optional = true }