Outdated dependencies

Actual:

```
warning microbundle > rollup-plugin-terser@7.0.2: This package has been deprecated and is no longer maintained. Please use @rollup/plugin-terser
warning microbundle > @rollup/plugin-commonjs > magic-string > sourcemap-codec@1.4.8: Please use @jridgewell/sourcemap-codec instead
warning microbundle > rollup-plugin-postcss > cssnano > cssnano-preset-default > postcss-svgo > svgo > stable@0.1.8: Modern JS already guarantees Array#sort() is a stable sort, so this library is deprecated. See the compatibility table on MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort#browser_compatibility
```

Expected:

Doesn't use deprecated and no longer maintained / outdated packages.

Would PRs be accepted that fix the reported outdated packages? I see 21 PRs in queue.

Thanks and best

Start by reproducing the reported warnings and tracing microbundle's dependency tree through rollup-plugin-terser, @rollup/plugin-commonjs, rollup-plugin-postcss, cssnano, and their transitive packages. Done means the reported deprecated or unmaintained packages are no longer present, with the relevant dependency checks passing.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.