Support jest esm mode

[viceice]

Description

I'm using jest in esm mode, because my code simply requires it. But i can't use this library as it expects jest globals.

Suggested Solution

Import expect from @jest/globals .
https://jestjs.io/docs/ecmascript-modules#differences-between-esm-and-commonjs

Help Needed

[xenoterracide]

I'm not using ESM, but I have the same problem because I don't want magic imports.