Prepare 17.2.0 (#671)

* Fix version

* Prepare 17.2.0
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index ba9a124..faf781a 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -5,7 +5,7 @@
 The third digit is only for regressions.
 
 
-17.2.0 (UNRELEASED)
+17.2.0 (2017-07-20)
 -------------------
 
 
diff --git a/src/OpenSSL/version.py b/src/OpenSSL/version.py
index 3f56798..5e5dee3 100644
--- a/src/OpenSSL/version.py
+++ b/src/OpenSSL/version.py
@@ -11,7 +11,7 @@
     "__title__", "__uri__", "__version__",
 ]
 
-__version__ = "17.2.0.dev0.0"
+__version__ = "17.2.0"
 
 __title__ = "pyOpenSSL"
 __uri__ = "https://pyopenssl.org/"