cargo: Downgrade Bitcoin to 0.31.0.

Author: ceyhunsen

integration_test/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 
 [dependencies]
 bitcoincore-rpc = { path = "../client" }
-bitcoin = { version = "0.32.2", features = ["serde", "rand", "rand-std"]}
+bitcoin = { version = "0.31.0", features = ["serde", "rand", "rand-std"]}
 lazy_static = "1.4.0"
 log = "0.4"
 tokio = { version = "1", features = ["full"] }

json/Cargo.toml

@@ -22,4 +22,4 @@ path = "src/lib.rs"
 serde = { version = "1", features = [ "derive" ] }
 serde_json = "1"
 
-bitcoin = { version = "0.32.2", features = ["serde"]}
+bitcoin = { version = "0.31.0", features = ["serde"]}