Update transact dependency to 0.3.12
This change updates the minimum transact version to 0.3.12, as it
contains a number of bug fixes needed to support the multi-threaded use
of SqlMerkleState that is present in scabbard.
@@ -49,7 +49,7 @@ features = ["lmdb", "transaction-receipt-store"]
[dev-dependencies]
tempdir = "0.3"
-transact = { version = "0.3.11", features = ["family-command", "sawtooth-compat"] }
+transact = { version = "0.3.12", features = ["family-command", "sawtooth-compat"] }
[build-dependencies]
protoc-rust = "2.14"
