Bump native-tls from 0.2.7 to 0.2.8

Bumps [native-tls](https://github.com/sfackler/rust-native-tls) from 0.2.7 to 0.2.8.
- [Release notes](https://github.com/sfackler/rust-native-tls/releases)
- [Changelog](https://github.com/sfackler/rust-native-tls/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sfackler/rust-native-tls/compare/v0.2.7...v0.2.8)

---
updated-dependencies:
- dependency-name: native-tls
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.lock

@@ -923,9 +923,9 @@ dependencies = [
 
 [[package]]
 name = "native-tls"
-version = "0.2.7"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8d96b2e1c8da3957d58100b09f102c6d9cfdfced01b7ec5a8974044bb09dbd4"
+checksum = "48ba9f7719b5a0f42f338907614285fb5fd70e53858141f69898a1fb7203b24d"
 dependencies = [
  "lazy_static",
  "libc",

crates/shadowsocks-service/Cargo.toml

@@ -86,7 +86,7 @@ rand = { version = "0.8", optional = true }
 futures = "0.3"
 tokio = { version = "1.5", features = ["io-util", "macros", "net", "parking_lot", "rt", "sync", "time"] }
 tokio-native-tls = { version = "0.3", optional = true }
-native-tls = { version = "0.2.7", optional = true, features = ["alpn"] }
+native-tls = { version = "0.2.8", optional = true, features = ["alpn"] }
 tokio-rustls = { version = "0.22", optional = true }
 webpki-roots = { version = "0.21", optional = true }
 rustls-native-certs = { version = "0.5", optional = true }