Bump fuzz afl dependency to latest upstream version

Author: TheBlueMatt

fuzz/Cargo.toml

@@ -18,7 +18,7 @@ libfuzzer_fuzz = ["libfuzzer-sys"]
 stdin_fuzz = []
 
 [dependencies]
-afl = { version = "0.4", optional = true }
+afl = { version = "0.12", optional = true }
 lightning = { path = "../lightning", features = ["regex"] }
 lightning-rapid-gossip-sync = { path = "../lightning-rapid-gossip-sync" }
 bitcoin = { version = "0.29.0", features = ["secp-lowmemory"] }