Updating type definitions to add IDBBatchAtomicVFS example

[thegoldenmule]

Checklist

• [x] I grant to recipients of this Project distribution a perpetual, non-exclusive, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, sublicense, and distribute this Contribution and such derivative works.
• [x] I certify that I am legally entitled to grant this license, and that this Contribution contains no content requiring a license from any third party.

Fix #218.