v13.1.0

Changes:

• [server] The cross-fetch dependency has been removed from the project to silence in the console DeprecationWarning's about a "punycode" module (#661)
• [browser] startRegistration() and startAuthentication() will now warn about calls made using the pre-v11 call structure to encourage refactoring to use the current call structure, but still try to handle such calls the best they can (#664)