fix: slider: fixes slider onresize event hang in react 16

[dkilgore-eightfold]

SUMMARY:

Small change to fix component when host app uses react 16

JIRA TASK (Eightfold Employees Only):

ENG-25504

CHANGE TYPE:

• Bugfix Pull Request
• Feature Pull Request

TEST COVERAGE:

• Tests for this change already exist
• I have added unittests for this change

TEST PLAN:

Pull changes, downgrade React peer deps to React 16.14.0 deps and test Slider story

[codecov-commenter]

Codecov Report

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The diff coverage is n/a.

@@           Coverage Diff           @@
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  Files           ?      384           
  Lines           ?    10334           
  Branches        ?     3464           
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  Hits            ?     9133           
  Misses          ?     1181           
  Partials        ?       20           

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