- Remove unrequired symbol check
- Dispose of `ZipDataCacheProvider` used in unit tests.
To avoid issues with other tests since zip files could remain open.
- Custom data types will know whether or not Lean should use map files
- Updating regression test with sample custom data using map files,
which can run locally
- Adding unit tests for the `SubscriptionDataReaderHistoryProvider`,
checking it mappes equities and options correctly
Martin Molinero