test: Bump bitcoind version to 30.2

Author: rustaceanrob

Cargo.toml

@@ -29,8 +29,8 @@ tokio = { version = "1.19", default-features = false, features = [
 ] }
 
 [dev-dependencies]
-corepc-node = { version = "0.10.0", default-features = false, features = [
-    "28_0", "download"
+corepc-node = { version = "0.12.0", default-features = false, features = [
+    "30_2", "download"
 ] }
 hex = { version = "0.4.0" }
 serde = { version = "1.0.219", features = ["derive"]}