feat(hooks): dispatch changes only when needed

[silviuaavram]

What:
Only trigger dispatch when state can change.
Also update the tests and add more tests to check rerenders and event preventDefault logic.

Fixes #1097

Why:
To prevent unnecessary rerenders and event.preventDefault.

How:

• Remove the conditions from the reducers and add them to the hooks instead.
• If conditions are not met, do not dispatch, do not preventDefault.
• Add tests to check events and rerenders.
• Refactor the stateReducer tests.

Breaking behaviors:

• stateReducer is now called only when the state is about to change, as we already mention in the documentation. This means that if you hit Home/End in an input that has a menu closed, there will be no state change.

Checklist:

• Documentation
• Tests
• TypeScript Types
• Flow Types
• Ready to be merged
  

[codecov-io]

Codecov Report

Merging #1218 (fcdee47) into master (4b6860e) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master     #1218   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        18           
  Lines         1643      1656   +13     
  Branches       470       478    +8     
=========================================
+ Hits          1643      1656   +13     

Impacted Files	Coverage Δ
src/hooks/useSelect/testUtils.js	100.00% <ø> (ø)
src/downshift.js	100.00% <100.00%> (ø)
src/hooks/useCombobox/index.js	100.00% <100.00%> (ø)
src/hooks/useCombobox/reducer.js	100.00% <100.00%> (ø)

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[github-actions]

🎉 This PR is included in version 6.1.0 🎉

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