MAINT: Make __slots__ a tuple.
MAINT: Make __slots__ a tuple.

humdings/zipline,florentchandelier/zipline,magne-max/zipline-ja,Scapogo/zipline,Scapogo/zipline,enigmampc/catalyst,umuzungu/zipline,bartosh/zipline,quantopian/zipline,enigmampc/catalyst,umuzungu/zipline,magne-max/zipline-ja,humdings/zipline,alphaBenj/zipline,wilsonkichoi/zipline,quantopian/zipline,alphaBenj/zipline,bartosh/zipline,wilsonkichoi/zipline,florentchandelier/zipline