Missing collections assetions

[SerVB]

Hi! I'm comparing assertk to assertj and bumped into innability to find some of the asserters for collections. Here are some of them:

• isSorted
• isSortedAccordingTo
• allMatch
• first

Do they exist or are they not yet implemented?

IMO those are quite useful, and should be provided ootb.

[evant]

index(0) should cover the first() case though it maybe could be added to convenience. I think allMatch is covered by .each { it.matches(...) }.

I think sorted assertions would be a good idea to add.