Add skip_deploy to GitHub release deploy provider

Potential fix for #2133

.travis.yml

@@ -33,6 +33,7 @@ script:
 deploy:
     # Releases (which are tagged) go to github
     - provider: releases
+      skip_cleanup: true
       api_key:
         secure: AjwbRLStNJZb9hAOLfRLK85KlFo2q2Dr1NKCoDS4elek1nqSiOjL1hH0kDgUMx/PJqQVnFU8tbJPL30t9Pj7jcJhp0LhbbPipQE3TCSpafTneSEbdz5HT+OdghWCZhUhfs07wGNTFUwcAO4WBZ7wv1AnfdfogHdA5RMdykiIl38=
       file:
@@ -47,12 +48,12 @@ deploy:
     # Any merge to master gets sent to
     # http://ckan-travis.s3-website-us-east-1.amazonaws.com/
     - provider: s3
+      skip_cleanup: true
       access_key_id: AKIAI5JWAEFPFK6GH3XA
       secret_access_key:
         secure: b0PPlD7auqysK2LHA8N1US03dE/VKH2rOTwIqpIh50l/gURuXEl7Nd8S7qlf2dpEmz+8D5pIWD+J9scfrdD8Uuakhi3sQbqcV26UiR6+Ye06eGQfmIzqzAECt2naqEy7VJ/xrqq5aaaf8QhcOQMba3qVvwDSzkB2fJeh7+D6EY8=
       bucket: ckan-travis
       acl: public_read
-      skip_cleanup: true
       local_dir: _build/repack/$BUILD_CONFIGURATION
       on:
         repo: KSP-CKAN/CKAN