Update dependency @babel/core to v7.12.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@babel/core (source)	devDependencies	patch	7.12.1 -> 7.12.3

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Release Notes

babel/babel

v7.12.3

Compare Source

🐛 Bug Fix

• babel-helper-wrap-function, babel-plugin-proposal-async-generator-functions
  • #​12192 fix: properly wrap private class methods (@​JLHwung)
• babel-core
  • #​12200 Make loadPartialConfig's options optional (@​nicolo-ribaudo)
• babel-parser
  • #​12185 [ts] Disallow invalid type annotations in ExpressionStatements (@​existentialism)

🏠 Internal

• Other
  • #​12204 chore: update test262 tests (@​JLHwung)
• babel-parser
  • #​12203 test: add test case for babel-parser: fixtures/typescript/arrow-function/destructuring-with-annotation-newline (@​Mongkii)

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[coveralls]

Coverage remained the same at 100.0% when pulling 0bab46e on renovate/babel-monorepo into ba25716 on master.