Use patch for parsec-interface-rs dependency

Patched dependency to use joechrisellis/parsec-interface-rs.

Author: Joe Ellis

Cargo.toml

@@ -26,3 +26,6 @@ mockstream = "0.0.3"
 [features]
 testing = ["parsec-interface/testing", "no-fs-permission-check"]
 no-fs-permission-check = []
+
+[patch.crates-io]
+parsec-interface = { git = "https://github.com/joechrisellis/parsec-interface-rs.git", branch = "add-list-keys" }