Error using type-fest with TypeScript version lower than 3.8.0

[adrianbrs]

When I try to use type-fest@1.3.0 in my Angular project with typescript@3.7.7 I get an error:

ERROR in node_modules/type-fest/source/typed-array.d.ts:1:21 - error TS2726: Cannot find lib definition for 'es2020.bigint'.

1 /// <reference lib="es2020.bigint"/>

As far as I can see, the es2020.bigint was introduced only in typescript@3.8.0.
microsoft/TypeScript#33871

I don't know if this error is expected, or if there is a workaround for this, because in the readme I saw that the minimum required version for TypeScript is 3.4.

Thanks.

[sindresorhus]

It's just a mistake in the readme.