No longer bump the version to 0.5.7

kellerkindt · kellerkindt · commit b0f5ee665646 · 2018-09-06T00:29:45.000+02:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -7,7 +7,7 @@ keywords = ["arm", "cortex-m", "register", "peripheral"]
 license = "MIT OR Apache-2.0"
 name = "cortex-m"
 repository = "https://github.com/japaric/cortex-m"
-version = "0.5.7"
+version = "0.5.6"
 
 [dependencies]
 aligned = "0.2.0"
