4.0.0 (2026-06-03)

• Moved jsdom and ws from optionalDependencies to peerDependencies
• Breaking: Strophe.shims has been removed. Instead, just use the globals.
• fix: encode SCRAM client-first-message as UTF-8 so that btoa() correctly handles non-ASCII
  characters in the authcid (e.g. accented usernames)