Drop patch release from Numcodecs version

Author: jakirkham

_posts/2019-05-02-zarr-2.3-release.md

@@ -149,7 +149,7 @@ Python 2.6 and 2.7). Due to the changes in its behavior from Python 2 to Python
 challenging to leverage effectively in Zarr. This despite the value of having
 zero-copy when storing data or performing filtering and compression.
 
-Thanks to some under-the-hood changes in Numcodecs 0.6.0 and Zarr 2.3, the
+Thanks to some under-the-hood changes in Numcodecs 0.6 and Zarr 2.3, the
 buffer protocol is now cleanly supported for Python 2/3 in both libraries when
 working with data. In addition to improved memory handling and performance,
 this should make it easier for users developing their own stores, compressors,