Getting ready for RC1

[kailuowang]

RC1 is the only planned RC release. 1.0.0 would probably be within a month after (unless we found more bugs that neccessets

Outstanding items (ones currently scheduled with RC1)

PRs

Most of them only 1 maintainer approval short.

• Add SortedMap instances Add SortedMap and SortedSet instances/Move Set and Map instances to Alleycats #1972
• Add a few type classes to generated tuple instances (continued) Add a few type classes to generated tuple instances (continued)  #1967
• Add CommutativeApply and CommutativeApplicative Add CommutativeApply and CommutativeApplicative #1927
• Add Invariant instances for kernel type classes Add Invariant instances for kernel type classes #1914
• Sync NEL and NEV methods (fixes NonEmptyVector.last #1832) Sync NEL and NEV methods (fixes #1832) #1838
• Add Parallel type class Add Parallel type class #1837
• Welcome, Alleycats Welcome, Alleycats #1984

Issues

• Foldable.toList potentially inconsistent for Map Foldable.toList potentially inconsistent for Map #1831
  • Move traverse, foldable instance for Map and Set to alleycats, add laws (no ticket yet, pending Welcome, Alleycats #1984)
• Foldable.iterateRight is not sound API Foldable.iterateRight is not sound #1973
• Kliesli is not stack-safe on left-associated binds Kliesli is not stack-safe on left-associated binds #1733
• [ ] ??? Consider adding some form newtypes to cats Consider adding some form of newtypes to cats #1800

??? If we can't reach consensus on it, we probably have to release without it.

Nice to have

• Reconsider the use of fold in Validated Reconsider the use of fold in Validated #1951

Please add here if you notice any missing items.

Update: removed #1800 from RC1 scope

[iravid]

Would be good to include #1733 in this list. Sync for ReaderT[IO, E, ?] seems very important.

[iravid]

Typo - >* instead of *>

[codecov-io]

Codecov Report

Merging #1974 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1974   +/-   ##
=======================================
  Coverage   95.08%   95.08%           
=======================================
  Files         301      301           
  Lines        4941     4941           
  Branches      123      123           
=======================================
  Hits         4698     4698           
  Misses        243      243

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[kailuowang]

@iravid for #1733, @johnynek 's solution seems good, does it necessitate an API addition to in cats (vs. letting users hand roll themselves)? If so, would you propose the new API in the issue?

[iravid]

I unfortunately cannot comment intelligently on the proposed solution (other than that it would necessitate a cats-core -> cats-free dependency) as I don't understand how the usage of flatMap should look after it is implemented.

[ceedubs]

Reconsider the use of fold in Validated #1951

Since this is a change that could be made in a completely compatible way, I don't see much of a reason that a 1.0 release should be blocked by it.

[kailuowang]

@ceedubs that's true, I had the same thought, I included it because the performance penalty seems significant and the fix is simple (if no-one else, I can give it an attack this week), I am going to move it out of the list though.

[LukaJCB]

What about #1831? I think we should address that in some way maybe

[johnynek]

Just one minor comment. This looks good to me.

[johnynek]

this is also a bug fix. I would either list it twice or move it there (I doubt any user will be hit by it as an incompatibility).

[LukaJCB]

My PR approval still stands if you decide to add this @kailuowang :) So go ahead and merge afterwards 🎉