New features and capabilities

• JavaScript engine migrated from Duktape to QuickJS-NG v0.11.0, with modern
  JavaScript syntax and native Promise/job-queue support.
• Added dukpy.run(path, **kwargs) and JSInterpreter.run(path, **kwargs);
  the dukpy CLI uses this file runner. run() supports native ESM static
  import/export, import.meta.url, import.meta.main, and top-level
  await.
• File entrypoints use Node-like classification: .mjs is ESM, .cjs is
  CommonJS, and .js follows the nearest package.json "type" of module
  or commonjs. Package-less ambiguous .js files are probed by compiling the
  CommonJS wrapper first, then native ESM; source text is not scanned.
• The QuickJS CommonJS runtime supports require, module, exports,
  __filename, and __dirname. Its cache is shared with ESM/CommonJS interop,
  and failed modules are removed so they can be retried.
• ESM can import CommonJS: the default export is module.exports; the only
  named exports are module, exports, and require. Named exports are not
  inferred from CommonJS source.
• Node-like fs, path, url, querystring, and punycode shims remain
  available.
• Promise microtasks drain before result serialization; Promise failures during
  evaluation or serialization raise JSRuntimeError.
• Python callbacks preserve argument order and JSON types, support Unicode names
  and Unicode/emoji values, map None returns to JavaScript undefined, and
  turn missing callbacks and Python exceptions into catchable ReferenceError
  and InternalError, respectively.
• Result conversion more closely follows JSON.stringify: null, undefined,
  NaN, Infinity, and -Infinity map to Python None; circular references
  and BigInt conversion failures raise runtime errors.
• Stack exhaustion and oversized allocations raise runtime errors, Python signal
  exceptions propagate, and blocking Atomics.wait is disabled.
• The npm installer uses HTTPS for registry and tarball URLs; rejects unsafe tar
  paths, path traversal, multiple roots, unsupported entries, and symlink
  destination escapes; and reports missing metadata, versions, and tarball URLs
  more clearly.
• Bundled TypeScript was upgraded to 5.7.3.

No longer available and behavior changes

• Generic Babel support was removed: dukpy.babel_compile, dukpy.webassets.BabelJS, and the babeljs WebAssets filter are unavailable; bundled Babel remains only for JSX transpilation.
• CoffeeScript support, including dukpy.coffee_compile, was removed.
• Duktape and its Duktape global, Duktape.modSearch, module system, error
  wording, and stack formatting are gone; code relying on them must use DukPy's
  QuickJS/CommonJS behavior and update exact-message expectations.
• Python versions below 3.9 are unsupported; 0.6.0 requires Python >=3.9,
  and old Python 2 compatibility code is gone.
• The old dukpy/run.py module is removed. Use dukpy.run(...); code importing
  main from dukpy.run breaks. The dukpy console command remains and now
  targets dukpy.cli:main.
• evaljs() remains script-only and does not auto-detect ESM syntax; run static
  import/export through dukpy.run() file entrypoints.
• CommonJS module IDs now use canonical file-like IDs with extensions and
  forward slashes, so exact old module.id or require.id strings may differ.
• require('x.mjs') and require() of .js files classified as ESM fail; use
  ESM import/dukpy.run(). CommonJS named imports are unsupported unless they
  are module, exports, or require; use the default import for its API.
• Top-level functions and Symbols now raise Invalid Result Value; undefined,
  NaN, and infinities map to None, and Duktape-specific or formerly {}
  results may differ.
• The installer rejects HTTP registry or tarball URLs, tarballs with symlinks,
  path traversal, multiple roots, or unsupported entries, and symlinked
  destinations.