bump the version in the Makefile

Author: mr-c

Makefile

@@ -33,7 +33,7 @@ COVBASE=coverage run --append
 
 # Updating the Major & Minor version below?
 # Don't forget to update setup.py as well
-VERSION=8.0.$(shell date +%Y%m%d%H%M%S --utc --date=`git log --first-parent \
+VERSION=8.1.$(shell date +%Y%m%d%H%M%S --utc --date=`git log --first-parent \
 	--max-count=1 --format=format:%cI`)
 
 ## all         : default task