Allow passing array of subscription tokens into unsubscribe #187
Description
Would be nice to just pass an array of sub tokens and have them all unsubscribed.
Something like
const subs = [ PubSub.subscribe(EVENT_1, (msg, data) => { ... }), PubSub.subscribe(EVENT_2, (msg, data) => { ... }), PubSub.subscribe(EVENT_3, (msg, data) => { ... }), ]; // then later... PubSub.unsubscribe(subs);:^)