bumping to version 3.0 (#58)

Author: steveren

config/build_conf.yaml

@@ -6,8 +6,8 @@ project:
   branched: true
   #siteroot: false
 version:
-  release: 'v2.3'
-  branch: 'v2.3'
+  release: 'v3.0'
+  branch: 'v3.0'
 system:
   files:
     - 'intersphinx.yaml'