6.0.0 (2022-05-25)

Upgrade guide

shims option is false by default: If you're dual-publishing (i.e. --format esm,cjs) and using platform specific API like import.meta.url, __dirname and __filename, you need to manually enable --shims flag now, because import.meta.url won't work in a cjs module, and __dirname, __filename won't work in an esm module.
target option is now node14 by default: previously it was node12, the minimal node version that tsup can run in is also changed to node14

New treeshake option: You can use Rollup for tree-shaking now, read more https://tsup.egoist.sh/#tree-shaking