v2.0.0 🌈

Changes

• docs: document migration from v1 to v2 @ThomasAribart (#165)
• feature: return initialEventTimestamp in listAggregateIds method @ThomasAribart (#163)
• feature: Enable passing options to push event group @ThomasAribart (#162)
• fix: remove any mention of snapshots @ThomasAribart (#161)
• fix: last naming @ThomasAribart (#160)
• feature: re-organize package folders @ThomasAribart (#157)
• feature: Rename some properties here & there @ThomasAribart (#156)