prepare for v1.6.1 release

Author: Jeff Whitaker

Changelog

@@ -1,4 +1,4 @@
- since version 1.6.0 release
+ version 1.6.1 (tag v1.6.1rel)
 ==============================
  * add Dataset methods has_<name>_filter (where <name>=zstd,blosc,bzip2,szip)
    to check for availability of extra compression filters.

README.md

@@ -10,6 +10,11 @@
 ## News
 For details on the latest updates, see the [Changelog](https://github.com/Unidata/netcdf4-python/blob/master/Changelog).
 
+09/18/2022:  Version [1.6.1](https://pypi.python.org/pypi/netCDF4/1.6.1) released.  GIL now
+released for all C lib calls, `set_alignment` and `get_alignment` module functions
+added to modify/retrieve HDF5 data alignment properties. Added `Dataset` methods to 
+query availability of optional compression filters.
+
 06/24/2022:  Version [1.6.0](https://pypi.python.org/pypi/netCDF4/1.6.0) released.  Support
 for quantization (bit-grooming and bit-rounding) functionality in netcdf-c 4.9.0 which can
 dramatically improve compression.  Dataset.createVariable now accepts dimension instances (instead

src/netCDF4/_netCDF4.pyx

@@ -1230,7 +1230,7 @@ if sys.version_info[0:2] < (3, 7):
     # Python 3.7+ guarantees order; older versions need OrderedDict
     from collections import OrderedDict
 
-__version__ = "1.6.0"
+__version__ = "1.6.1"
 
 # Initialize numpy
 import posixpath