Bump version

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "unwinding"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["Gary Guo <gary@garyguo.net>"]
 edition = "2018"
 license = "MIT OR Apache-2.0"