resolves #224

BREAKING CHANGE: major version changes in `@rollup/plugin-commonjs` and `@rollup/plugin-replace`

closes #214

* avoids inlining subpaths or fully resolved paths

Co-authored-by: lihbr <lihbr@users.noreply.github.com>
Co-authored-by: Daniel Roe <daniel@roe.dev>

Co-authored-by: lihbr <lihbr@users.noreply.github.com>

BREAKING CHANGE: esbuild upgrade to 0.12

* https://github.com/evanw/esbuild/blob/master/CHANGELOG.md#0120

BREAKING CHANGE: Requires Node 12+
BREAKING CHANGE: produces .mjs in subpath exports

* See mkdist CHANGELOG for full details of .mjs breaking change https://github.com/unjs/mkdist/blob/main/CHANGELOG.md#020-2021-04-21

BREAKING CHANGE: esbuild 0.11.0: https://github.com/evanw/esbuild/blob/master/CHANGELOG.md#0110 and https://github.com/evanw/esbuild/blob/master/CHANGELOG.md#0100

BREAKING CHANGE: see particularly https://github.com/evanw/esbuild/blob/master/CHANGELOG.md#090