Revert "chore(deps): bump rustls from 0.19.1 to 0.20.0 (#206)" (#207)

This reverts commit 58e3237.

Author: conblem

Cargo.lock

@@ -33,7 +33,7 @@ acme-lib = "0.8"
 trust-dns-server = { version = "0.20", features = ["resolver", "dns-over-rustls", "dns-over-https-rustls"] }
 parking_lot = "0.11"
 futures-util = "0.3"
-rustls = "0.20"
+rustls = "0.19"
 toml = "0.5"
 anyhow = "1.0"
 ppp = "1"