Bump core-js from 2.6.3 to 3.1.0

[dependabot-preview]

Bumps core-js from 2.6.3 to 3.1.0.

Changelog

Sourced from core-js's changelog.

3.1.0 - 2019.05.20

• String#matchAll moved to stable ES, exposed Symbol.matchAll, #516
• Promise.allSettled moved to stage 3, #515
• String#replaceAll moved to stage 2, behavior updated by the spec draft, #524
• Promise.any moved to stage 1, #517
• Removed es.regexp.flags dependency from es.regexp.to-string, #536, #537
• Fixed IE8- non-enumerable properties support in Object.{ assign, entries, values }, #541
• Fixed support of primitives in Object.getOwnPropertySymbols in Chrome 38 / 39, #539
• window.postMessage-based task implementation uses location origin over '*', #542
• Lookup PromiseConstructor.resolve only once in Promise combinators, tc39/ecma262#1506
• Temporarily removed core-js dependency from core-js-compat since it's required for missed at this moment feature
• Show a message on postinstall
• Added compat data for Chrome 76, FF 67, Node 12

2.6.6 [LEGACY] - 2019.05.20

• Fixed IE8- non-enumerable properties support in Object.{ assign, entries, values }, #541
• Fixed support of primitives in Object.getOwnPropertySymbols in Chrome 38 / 39, #539
• Show a message on postinstall

3.0.1 - 2019.04.06

• Fixed some cases of work with malformed URI sequences in URLSearchParams, #525
• Added a workaround for a rollup issue, #513

3.0.0 - 2019.03.19

• Features
  • Add new features:
    • Object.fromEntries (ECMAScript 2019)
    • Symbol#description (ECMAScript 2019)
    • New Set methods (stage 2 proposal)
      • Set#difference
      • Set#intersection
      • Set#isDisjointFrom
      • Set#isSubsetOf
      • Set#isSupersetOf
      • Set#symmetricDifference
      • Set#union
    • Promise.allSettled (stage 2 proposal)
    • Getting last item from Array (stage 1 proposal)
      • Array#lastItem
      • Array#lastIndex
    • String#replaceAll (stage 1 proposal)
    • String#codePoints (stage 1 proposal)
    • New collections methods (stage 1 proposal)
      • Map.groupBy
      • Map.keyBy
      • Map#deleteAll
      • Map#every
      • Map#filter
      • Map#find
      • Map#findKey

... (truncated)

Commits

• 55bed8d 3.1.0
• e706d7f update dependencies
• 3eecc7f update the changelog
• abdaeb8 update a message on postinstall
• 4fae462 update the changelog
• 1e14cf0 show a message about sponsorship on postinstall
• 7b8788b fix license file in core-js-compat
• b5b973c fix license file in core-js-bundle
• 7718f5c update dependencies
• 0fc736c Merge pull request #544 from yaodingyd/patch-1
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #362.