`yarn prepack` and `yarn test` fail for typescript: 4.4.4

[sunny775]

We are trying to build this package for Debian, but unfortunately both build and tests are failing as they seem not to be compartible with typescript version 4.4.4 which we currently have in Debian ( https://tracker.debian.org/pkg/node-typescript )

We'd appreciate a fix to build with much more recent version of typescript