Update dependency core-js to v3.9.0

This MR contains the following updates:

Package	Type	Update	Change
core-js	dependencies	minor	3.8.3 -> 3.9.0

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Release Notes

zloirock/core-js

v3.9.0

Compare Source

• Added Array find from last stage 1 proposal
  • Array#findLast
  • Array#findLastIndex
  • %TypedArray%#findLast
  • %TypedArray%#findLastIndex
• Added %TypedArray%#uniqueBy method for array deduplication stage 1 proposal
  • %TypedArray%#uniqueBy
• Dropped ToLength detection from array methods feature detection which could cause hanging FF11-21 and some versions of old WebKit, #​764
• Minified bundle from core-js-bundle uses terser instead of uglify-js

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