fix build number for staging

pkg/recipe/meta.yaml

@@ -6,7 +6,7 @@ source:
   git_url:     ../..
 
 build:
-  number:      3
+  number:      {{ GIT_DESCRIBE_NUMBER }}
 
 requirements:
   build:
@@ -60,6 +60,4 @@ requirements:
     - python=3.7.*
 
 about:
-  home: https://gitlab.inria.fr/dtk/dtk-script
-  license: BSD
-  summary:  python wrappers for dtk-imaging
+  home: https://gitlab.inria.fr/dtk/dtk-imaging-python