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

@@ -1403,9 +1403,9 @@ checksum = "342a407881dbd200f13a08ff8a5413232e035ed7ba56dba8c81137e3afce4f84"
 
 [[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",