Bump pyo3 version to 0.2.2

Author: messense

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pyo3"
-version = "0.2.2-dev"
+version = "0.2.2"
 description = "Bindings to Python interpreter"
 authors = ["PyO3 Project and Contributors"]
 readme = "README.md"
@@ -22,7 +22,7 @@ log = "0.3"
 libc = "0.2"
 spin = "0.4.6"
 num-traits = "0.1"
-pyo3cls = { path = "pyo3cls" }
+pyo3cls = { path = "pyo3cls", version = "0.2.0" }
 
 [build-dependencies]
 regex = "0.2"