Draft of 0.4.0 release notes

[travisbrown]

I'll update if any last-minute stuff makes it in before the release. Rendered version available here for now.

[fthomas]

👍 That's an impressively long list of changes!

[non]

Thanks @travisbrown!

[codecov-io]

Current coverage is 89.27%

Merging #848 into master will not affect coverage as of e829231

@@            master    #848   diff @@
======================================
  Files          168     168       
  Stmts         2322    2322       
  Branches        75      75       
  Methods          0       0       
======================================
  Hit           2073    2073       
  Partial          0       0       
  Missed         249     249       

Review entire Coverage Diff as of e829231

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[non]

Cats 0.4.0 is on Sonatype. Let's wait until it hits Maven Central and then merge this PR. 👍

[non]

Actually we can merge this now but wait to update the README, etc until the sync happens.

[DavidGregory084]

@non @travisbrown Just thought I'd point out that #809 went into topic/kernel so I don't think it will be in 0.4.0

[travisbrown]

@DavidGregory084 Thanks for catching that—not sure how it slipped through…

[DavidGregory084]

No problem, just spotted it while I was reading the 🤘 epic list of changes 🤘

[aryairani]

Extra ‘)’?

[travisbrown]

@refried What do you mean? The first closes the link and the second the parenthetical.