Set version to 2.9.1

Author: manisandro

CHANGES.rst

@@ -1,9 +1,15 @@
+Version 2.9.1
+
+- _sane.c:
+
+  - Fix compatibility with python3.6+
+
 Version 2.9.0
 -------------
 
 - Removed support for Python 2
 
--_sane.c, sane.py:
+- _sane.c, sane.py:
 
   - Add a progress parameter for the snap, arr_snap, scan and arr_scan methods.
 

sane.py

@@ -5,7 +5,7 @@
 # of SANE, consult the documentation at the SANE home page:
 # http://www.sane-project.org/docs.html
 
-__version__ = '2.9.0'
+__version__ = '2.9.1'
 __author__ = ['Andrew Kuchling', 'Ralph Heinkel', 'Sandro Mani']
 
 import _sane

setup.py

@@ -8,7 +8,7 @@
                  sources=['_sane.c'])
 
 setuptools.setup(name='python-sane',
-      version='2.9.0',
+      version='2.9.1',
       description='This is the python-sane package',
       url='https://github.com/python-pillow/Sane',
       maintainer='Sandro Mani',