MapAssert check contains key when extracting keys implicitly

[xenoterracide]

Feature summary

MapAssert.extractingByKeys (and related) should verify the key exists to avoid an NPE

Example

This works

Assertions.assertThat(altIds).hasSize(1).containsKey(alternateId).extractingByKeys(alternateId) //check more stuff

This can result in an NPE if the key is missing, but I believe should be implicitly equivalent to the above giving a better error if extraction can not occur. If notEmpty() is not called, it probably also should be.

Assertions.assertThat(altIds).hasSize(1).extractingByKeys(alternateId) // check more stuff

if the NPE is a bug this is version 3.23.0