Updated celery

Pipfile

@@ -21,7 +21,7 @@ flask-migrate = "*"
 python-gitlab = "*"
 psycopg2-binary = "*"
 flask-restplus = "*"
-celery = {extras = ["auth", "yaml", "msgpack", "redis"]}
+celery = {version = "*", extras = ["auth", "redis", "yaml", "msgpack"]}
 mockredispy = "*"
 python-slugify = "*"
 coloredlogs = "*"