createStructuredSelector type definitions with auto-infer

[toomuchdesign]

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Typing feature

What is the current behaviour? (You can also link to an open issue here)

Current createStructuredSelector type definition doesn't provide auto-inferring and need users to explicitly provide generics types.

Typing definitions tested in non-strict mode

See: #428

What is the new behaviour?

Provide a different typing strategy as suggested by @oatkiller.

Updates type definitions tests to run in strict mode

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

Yes.

1. New types need Typescript > 3.1
2. New types provide working auto-inferring but expose different custom generics definitions. I'd expect users who provided custom generics to their createStructuredSelector calls to have to remove them in order to compile again with the TS compiler.

Unfortunately I wasn't able to to express the new types in a non-breaking way. It may be that is possible.

Other information:

Parallelly working on a similar solution for re-reselect.

In case this gets merged in future I'd suggest the maintainers to rebuild package-lock.json in commit b9ea429 on their own machines.

Please check if the PR fulfills these requirements:

• Tests for the changes have been added
• Docs have been added / updated

[codecov]

Codecov Report

Merging #454 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #454   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           15        15           
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  Hits            15        15           

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[eXamadeus]

This is a useful one to look at for #485 and #484

[markerikson]

Closing since this is now included in #486