conda: fix noarch => python_version_independent

vis. https://docs.conda.io/projects/conda-build/en/stable/resources/define-metadata.html#python-version-independent-packages

Author: casperdcl

recipe/meta.yaml

@@ -13,7 +13,7 @@ package:
 build:
   preserve_egg_dir: False
   number: {{ build_number }}
-  noarch: python
+  python_version_independent: true
   run_exports:
     - {{ pin_subpackage(project.get('name'), max_pin='x.x') }}
     - {{ project.get('name') }} =*=cuda* # [cuda_compiler_version != "None"]