adjust rust-version declaration
@@ -10,7 +10,7 @@ license = "BSD-3-Clause"
keywords = ["prolog", "prolog-interpreter", "prolog-system"]
categories = ["command-line-utilities"]
build = "build/main.rs"
-rust-version = "1.57"
+rust-version = "1.61"
[features]
num = ["num-rug-adapter"]
