fix: ignore esbuild warning if silent is true (egoist#643)

fix: add missing `tsup-node` command

Revert "chore(deps): update postcss-load-config"

This reverts commit 485f432.

chore: adding postcss and swc to optional peerDependencies

fix: update `source-map` to 0.8.0-beta.0, closes egoist#623

the `source-map` package is broken in Node.js 18, it was fixed but the beta version was never released

see mozilla/source-map#454

chore: update release command

fix(dts): use relative `baseUrl` in tsconfig, closes egoist#611

fix: Exit Code returns 0 for failed builds, closes egoist#606

fix: make sure `sources` are relative path in sourcemap, closes egois…

…t#603

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