Merge pull request #2697 from deltachat/dependabot/cargo/async-tar-0.4.2

Author: dependabot[bot]

Cargo.lock

@@ -22,7 +22,7 @@ async-native-tls = { version = "0.3" }
 async-smtp = { git = "https://github.com/async-email/async-smtp", branch="master", features = ["socks5"] }
 async-std-resolver = "0.20"
 async-std = { version = "1", features = ["unstable"] }
-async-tar = "0.3"
+async-tar = "0.4"
 async-trait = "0.1"
 backtrace = "0.3"
 base64 = "0.13"