text: Title: Summary of updated snapshots
  Body: **Is your feature request related to a problem? Please describe.**
  
  When I run snapshot update and only a few snapshots have changed or a few new ones get created it currently gives a summary saying "x snapshots have been updated". 
  
  
  **Describe the solution you'd like**
  
  It would be wonderful if it could print a complete list of the names of each of the snapshots so that you can feel more confident that only the ones you expected to be updated / created were changed. This would give me more confidence when updating snapshots and a clear list of the ones I should go look at manually to validate their correctness. Ideally it would have a separate section where it prints the names of any snapshots that were updated and then another section for printing the names of newly created snapshots.
  
  
  
  Thank you very much for this awesome library it saves me so much time and effort and has beautiful syntax.
  
  
  