fix(typings): add missing StrictMenuProps type export

[b-smets]

The type definition was missing an export for StrictMenuprops in the top level type definition file.

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Here is a list of things that will help get it across the finish line:

• Run yarn lint locally to catch formatting errors. This will fix some errors automatically, commit and push any changes.
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• Include tests when adding/changing behavior.

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[codecov-io]

Codecov Report

Merging #3755 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3755   +/-   ##
=======================================
  Coverage   99.84%   99.84%           
=======================================
  Files         175      175           
  Lines        3125     3125           
=======================================
  Hits         3120     3120           
  Misses          5        5

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