All files have revisions management in Google Drive. You can see this feature by doing: Right click on a file > Manage revisions... Then it's up to the client

All files have revisions management in Google Drive. You can see this feature by doing: Right click on a file > Manage revisions... Then it's up to the client using the Drive API to use the correct parameter when uploading a new change to create a new revision or overwrite the current revision.