Bump core-js from 2.6.12 to 3.8.1

[dependabot-preview[bot]]

Bumps core-js from 2.6.12 to 3.8.1.

Changelog

Sourced from core-js's changelog.

3.8.1 - 2020.12.06

• Fixed work of new %TypedArray% methods on BigInt arrays
• Added ESNext methods to ES3 workaround for Number constructor wrapper

3.8.0 - 2020.11.26

• Added relative indexing method stage 3 proposal
  • Array#at
  • %TypedArray%#at
• Added Number.range stage 1 proposal
  • Number.range
  • BigInt.range
• Added array filtering stage 1 proposal
  • Array#filterOut
  • %TypedArray%#filterOut
• Added array deduplication stage 1 proposal
  • Array#uniqueBy
• Added code points / code units explicit feature detection in String#at for preventing breakage code which use obsolete String#at proposal polyfill
• Added the missed (es|stable)/instance/replace-all entries
• Updated compat data mapping for Opera - from Opera 69, the difference with Chrome versions increased to 14
• Compat data mapping for modern Android WebView to Chrome moved from targets parser directly to compat data
• Depracate core-js-builder blacklist option in favor of exclude

Commits

• 4645db4 3.8.1
• 78a9a24 fix work of new %TypedArray% methods on BigInt arrays
• caf5949 update eslint
• 3808b58 update dependencies
• d39ce91 update dependencies
• 440f186 update dependencies
• f032dd8 update dependencies
• 49d7978 update dependencies
• 79daf40 add ESNext methods to ES3 workaround for Number constructor wrapper
• 1d24b54 update qunit
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #121.