Update kotlin-result library to v2

[vewert]

Starting with v2 the kotlin-result library models its Result type as an inline value class, in order to reduce overhead,

see: https://github.com/michaelbull/kotlin-result
and: https://github.com/michaelbull/kotlin-result/wiki/Overhead

This update, however, makes some breaking changes to API.

We should update our library to be able to use this new version.

[vewert]

It looks like the new inlined Result type, makes it more difficult to interop with Java (and other jvm languages), see: michaelbull/kotlin-result#101.

Will hold off on upgrading to v2 for a bit.