Use log 0.4

Author: messense

Cargo.toml

@@ -18,7 +18,7 @@ name = "compiletest_rs"
 diff = "0.1.10"
 filetime = "0.1"
 getopts = "0.2"
-log = "0.3"
+log = "0.4"
 tempdir = { version = "0.3", optional = true }
 serde = "1.0"
 serde_json = "1.0"