deps: update extractErrors plugin to Babel 7 and more

[agilgur5]

Description

This plugin was out-of-date by a good bit, so have updated a good bit to a more current version.

Commits

license: add FB License header to all extractErrors code

• this plugin is largely borrowed from the React monorepo, consistently
  add FB's License headers to each file, not just to extractErrors.ts

• also add comments pointing to the exact file and commit that each
  file was copied from

  • most of these are slightly out of date now:
    • evalToString is missing a line
    • extractErrors needs to be updated to Babel 7
      • babylon -> @babel/parser, babel-traverse -> @babel/traverse
    • transformErrorMessages has several new constructs added :/...
      • keeping a pseudo-fork up-to-date is pretty tedious and not very
        maintainble (it's also broken per the tests I've added)
        • would be better if we could ask FB to split out theirs as a
          separate package...

clean: bad whitespace and Flow types in extractErrors

• whitespace errors in extractErrors
• unnecessary Flow comments in invertObject when we're using TS
  • also inconsistent, it looks like they've been removed and replaced
    with TS elsewhere
    • here TS types were added but Flow was also left in

deps: update extractErrors Babel plugins to Babel 7

• this was using Babel 6's Babylon and babel-traverse, which meant two
  different versions of Babel were being used and a lot of unnecessary
  deps were in the tree

  • now there should no longer be any Babel 6 deps in the tree
  • also transformErrorMessages was already using Babel 7
    (@babel/helper-module-imports) while extractErrors was on Babel 6
    just for extra inconsistency 😬
    • these two files seemed to be updated at the same time to Babel 7
      as far as I can tell though 🤨

• @babel/parser ships its own typings now, so no need to use the
  declare module workaround for it anymore

  • but did have to add a type-cast as its usage doesn't entirely fit
    the type 😕

• this also helps remove an old version of core-js v2, the addition of
  which would give a deprecation warning on install:

  • "npm WARN deprecated [email protected]: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3."

EDIT: forgot to mention I also checked the Babel 7 migration guide which mentions babel-traverse, babylon, and AST changes in general, which all seemed compatible to me (and React team must have checked it already too).

deps: update extractErrors plugin's evalToString file

• a line was added upstream in the last year, so add it here too to be
  up-to-date
  • now only transformErrorMessages is out-of-date ...but there's a
    little too many changes for me to really prioritize right now

Tags

Follow-up to #138 I suppose

Some React PRs that updated this part of their monorepo:

• Babel 7: Babel 7 facebook/react#16297
• Babylon -> @babel/parser: Use babel parser rather than Babylon in extract errors facebook/react#17988
• Literal addition in evalToString: Use console directly instead of warning() modules facebook/react#17599

TODO to be added to transformErrorMessages... well I'd prefer asking FB/React to split out their code as a separate package than maintaining this though:

• Remove IIFE wrappers from dev invariant checks facebook/react#16963
• Pass prod error messages directly to constructor facebook/react#17063

In tandem with #795 which removed the unused @babel/polyfill dep (and its core-js v2 dep), this should remove the last deprecation warning I know of that TSDX v0.13.3 has from #789 (comment) by removing the last core-js v2 usage:

npm WARN deprecated [email protected]: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3. // @babel/polyfill and babel-traverse

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[agilgur5]

LGTM 👍 . Dependency removal gr8