Fix log4s version
This was erroneously changed.
@@ -32,7 +32,7 @@ rust-crypto = "0.2.36"
sawtooth-sdk = {git = "https://github.com/hyperledger/sawtooth-sdk-rust"}
rustc-serialize = "0.3.22"
log = "0.3.0"
-log4rs = "0.7.1"
+log4rs = "0.7.0"
[build-dependencies]
