README.md in preservation-client-2.0.0 vs README.md in preservation-client-2.1.0

@@ -92,9 +92,12 @@
   - you may specify the subset (all|shelve|preserve|publish) and/or the version:
     - `client.objects.content_inventory_diff(druid: 'oo000oo0000', subset: 'publish', version: '1', content_metadata: '<contentMetadata>...</contentMetadata>')`
 
 - `client.objects.shelve_content_diff(druid: 'oo000oo0000', content_metadata: '<contentMetadata>...</contentMetadata>')` - returns Moab::FileGroupDifference containing differences between passed content metadata and latest version for subset 'shelve'
 
+### Alert the catalog that an object has been changed and needs to be updated
+
+- `client.update(druid: 'oo000oo0000', version: 3, size: 2342, storage_location: 'some/storage/location')` - returns true if it worked
 ## Development
 
 After checking out the repo, run `bundle` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
 
 To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `lib/preservation/client/version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).