update type definitions with onKeyDown prop

[BusseBu]

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[codecov]

Codecov Report

Merging #186 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #186   +/-   ##
=======================================
  Coverage   91.86%   91.86%           
=======================================
  Files           6        6           
  Lines         381      381           
  Branches       99       99           
=======================================
  Hits          350      350           
  Misses         31       31

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