Snapshot error prevents aggregate from being loaded

[gudleik]

> await MyAggregate.load(key)
TypeError: Cannot convert undefined or null to object
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Job.hydrate (/src/node_modules/@ddes/core/lib/Aggregate.ts:388:54)
    at Function.get snapshotCompatChecksum [as snapshotCompatChecksum] (/src/node_modules/@ddes/core/lib/Aggregate.ts:80:48)
    at Array.map (<anonymous>)
    at components.push.Object.keys.map.eventType (/src/node_modules/@ddes/core/lib/Aggregate.ts:82:28)
    at Function.keys (<anonymous>)

Suggestion: if there are any errors with the snapshot, just log and ignore the error