Bump bitcoin dep to 0.21

Author: TheBlueMatt

fuzz/Cargo.toml

@@ -19,7 +19,7 @@ stdin_fuzz = []
 [dependencies]
 afl = { version = "0.4", optional = true }
 lightning = { path = "../lightning", features = ["fuzztarget"] }
-bitcoin = { version = "0.20", features = ["fuzztarget"] }
+bitcoin = { version = "0.21", features = ["fuzztarget"] }
 bitcoin_hashes = { version = "0.7", features = ["fuzztarget"] }
 hex = "0.3"
 honggfuzz = { version = "0.5", optional = true }

lightning-net-tokio/Cargo.toml

@@ -9,7 +9,7 @@ For Rust-Lightning clients which wish to make direct connections to Lightning P2
 """
 
 [dependencies]
-bitcoin = "0.20"
+bitcoin = "0.21"
 bitcoin_hashes = "0.7"
 lightning = { version = "0.0.9", path = "../lightning" }
 secp256k1 = "0.15"

lightning/Cargo.toml

@@ -22,12 +22,12 @@ max_level_info = []
 max_level_debug = []
 
 [dependencies]
-bitcoin = "0.20"
+bitcoin = "0.21"
 bitcoin_hashes = "0.7"
 secp256k1 = "0.15"
 
 [dev-dependencies.bitcoin]
-version = "0.20"
+version = "0.21"
 features = ["bitcoinconsensus"]
 
 [dev-dependencies]