Update build_conf.py (#530)

Author: zach-carr

config/build_conf.yaml

@@ -29,7 +29,7 @@ system:
     - 'sphinx_local.yaml'
     - htaccess: ['htaccess.yaml']
 version:
-  release: '1.15.3'
+  release: '1.16.0'
   branch: 'master'
 assets:
   - branch: master