Update to 3.4.1, stop replacing bundled jiffy, switch to bundled QuickJS, add check

• upgpkg: 3.4.1
  • Fixes #2 (closed).
• Stop replacing bundled jiffy
  • The bundled jiffy has been updated to 1.1.2 which is now compatible and newer than 1.1.1.
  • https://github.com/apache/couchdb/commit/d9329f24e9bdaea753beb7bc2c21514c522288bc
• Switch from js91 to bundled QuickJS
  • Related js91#1 (closed).
• Add check