Prepare 16.2.0 (#555)

* Add empty line to CHANGELOG so extraction works

* Fix a bunch of links

* Prepare 16.2.0
diff --git a/src/OpenSSL/version.py b/src/OpenSSL/version.py
index d2912b9..29103d2 100644
--- a/src/OpenSSL/version.py
+++ b/src/OpenSSL/version.py
@@ -11,7 +11,7 @@
     "__title__", "__uri__", "__version__",
 ]
 
-__version__ = "16.2.0.dev0"
+__version__ = "16.2.0"
 
 __title__ = "pyOpenSSL"
 __uri__ = "https://pyopenssl.readthedocs.io/"