Bump version to 2.8.1

Author: PierreRaybaut

plotpy/__init__.py

@@ -20,7 +20,7 @@
 .. _GitHub: https://github.com/PierreRaybaut/plotpy
 """
 
-__version__ = "2.8.0"
+__version__ = "2.8.1"
 __VERSION__ = tuple([int(number) for number in __version__.split(".")])
 
 # --- Important note: DATAPATH and LOCALEPATH are used by guidata.configtools