chore: update ci node version

fix: update to cssnano 5 (#357)

feat: upgrade postcss to 8.x

BREAKING CHANGE: upgrade postcss to 8.x

Co-authored-by: Edward Elric <[email protected]>
Co-authored-by: Ward Peeters <[email protected]>

fix: make sourceMaps relative to the CSS output file (#274)

Co-authored-by: Ward Peeters <[email protected]>

fix(types): `options` is actually optional (#311)

Co-authored-by: Ward Peeters <[email protected]>

fix: extract css in same order as imports (#295)

fix: Typing of namedExports option

build(deps): bump lodash from 4.17.15 to 4.17.19 (#294)

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.19)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

fix: allow module config while using autoModules (#281) (#292)

Refs developit/microbundle#653, developit/microbundle#617

build: tweak release action