@babel/runtime-corejs2

Thanks @Eyoatam, @lightmare, @ota-meshi, and @tony-go for your first PRs!

:eyeglasses: Spec Compliance

• babel-plugin-proposal-do-expressions, babel-traverse

  • fix: hoist variable declaration within do block (@JLHwung)

• babel-parser

  • Relax import assertion key-is-type constraint (@JLHwung)

:bug: Bug Fix

• babel-parser

  • fix(parser): correctly parse record and tuple tokens (@fedeci)

  • fix: throw when async() call param is object with assignement (@tony-go)

  • Add support for d flag of regex literals in parser (@ota-meshi)

• babel-helpers

  • fix generate-helpers failing in URL-encoded path (@lightmare)

:house: Internal

• babel-helper-hoist-variables

  • Disallow dependency cycles (@nicolo-ribaudo)

• babel-parser

  • update test fixtures (@JLHwung)

  • Reduce exprAllowed usage (@JLHwung)

  • fix(@babel/parser): fix tokenizer context update code (@Eyoatam)

• Other

  • chore: specify @babel/eslint-parser deps (@JLHwung)

• Every package

  • chore: setup Yarn constraints (@merceyz)

:running_woman: Performance

• babel-parser

  • Use set in parser scope (@JLHwung)

  • Faster checkReservedWord (@JLHwung)

  • Back parser state exportedIdentifiers by set (@JLHwung)