Add Drupal 8.0.0-beta9! :tada:

library/drupal

@@ -3,3 +3,8 @@
 7.36: git://github.com/docker-library/drupal@7e4e3c38aadbfaf5e6662d2f0ddf2070f1e0e357 7
 7: git://github.com/docker-library/drupal@7e4e3c38aadbfaf5e6662d2f0ddf2070f1e0e357 7
 latest: git://github.com/docker-library/drupal@7e4e3c38aadbfaf5e6662d2f0ddf2070f1e0e357 7
+
+8.0.0-beta9: git://github.com/docker-library/drupal@55d3e328aee754e41f7b702a00a882d64e195e88 8
+8.0.0: git://github.com/docker-library/drupal@55d3e328aee754e41f7b702a00a882d64e195e88 8
+8.0: git://github.com/docker-library/drupal@55d3e328aee754e41f7b702a00a882d64e195e88 8
+8: git://github.com/docker-library/drupal@55d3e328aee754e41f7b702a00a882d64e195e88 8