v5.0.0
Kill the term "reducing function"
Improve warnings and add to Fundamentals parts 1 and 5
Drop UMD mentions
Clarify RTK Query status and recommendations in tutorials
Nuke most "ES2015" references
Update migration page
Fix outdated link to "Do I have to put all my state into Redux?" (#4439)
Update docs to MSW 2.0 | rest import discontinued and replaced by http instead (#4607)