Reltester 2.0.0 adds support for four new traits: Hash, Iterator, FusedIterator, and DoubleEndedIterator. Thus, with this major release Reltester is expanding in scope as it becomes a tool for checking trait invariants for a growing number of traits in the standard library – and who knows, maybe one day even outside of it.
Besides these feature additions, the notable breaking change from this release results from the new Error type. reltester::error::Error is now an enum with sub-error types as invariants, which allows Reltester to be more specific in function signatures about what kind of error might be returned.