v1.6.0

• Exposed both ESM and CommonJS builds. Your bundler should pick the right version using either package.json's main or module fields.
• Added start() and endAll() methods + deprecated startFlow() and endAllFlows()
• Added typing for userflow.start()'s new once option. See Userflow.js docs.
• Deprecated immediate option in typings, which are no longer being used.
• Moved loadUserflow() to a directly exported function. Old userflow.loadUserflow has been deprecated.