updated CHANGELOG and __pkginfo__ files

CHANGELOG

+version 0.8.0
+-------------
+* CHANGED   modified packme to be compatible with new version of packer (iso_checksum_type is removed)
+
 version 0.7.0
 -------------
 * CHANGED   propagate the headless state to all children

src/packme/__pkginfo__.py

@@ -20,7 +20,7 @@ __status__ : str = "Prototype"
 
 __url__ : str = "https://code.ill.fr/panosc/data-analysis-services/packme"
 
-__version__ : str = "0.7.0"
+__version__ : str = "0.8.0"
 
 __long_description_content_type__ : str ="text/markdown"