@tsconfig/node20 in this repo currently has lib es2023 and target es2022.
However, https://github.com/microsoft/TypeScript/wiki/Node-Target-Mapping suggests target es2023 for Node 20. This appears to have been a change to the Wiki made by @andrewbranch in December: https://github.com/microsoft/TypeScript/wiki/Node-Target-Mapping/_compare/fc10f937d057e53083f3466792cafaf02c773f30...40ebdf5b7839e149e6c20c127dca1ee31b987a64
Which target should we use, if we want to support Node v20?