Avoid repeated branches while iterating StringView

Summary:
`quoteStringForJSON` was operating via indexed access on `StringView`,
performing an `isASCII()` check every iteration and leading to slow
quoting during `JSON.stringify`.

Modify the function to take `UTF16Ref` or `ASCIIRef` directly,
so that it knows the type.

This increases code size slightly while resulting in significant
speedups in `JSON.stringify`.

Reviewed By: neildhar

Differential Revision: D46117526

fbshipit-source-id: e6b849fc8b4e2e748e05d277e36462b8d97ae095

Fix Intl to clear needDefault flag correctly (facebook#1014)

Summary:
Similar to year, month, and day, specifying "weekday" as an option to
`toLocaleString` should result in only the weekday being printed. To
force this, use the `kDateRequired` bit as we do for the other fields.

Pull Request resolved: facebook#1014

Test Plan: Added a test in the next diff.

Reviewed By: tmikov

Differential Revision: D49856174

Pulled By: neildhar

fbshipit-source-id: ed52f425e4240f672931d236bc53cc58724b6747

Unsubscribe heap callbacks on destruction

Summary: Disable heap object stack tracing upon destruction.

Reviewed By: dannysu

Differential Revision: D49477452

fbshipit-source-id: d7984c8293351727df1cf734bcb634647a1c578c

Avoid repeated branches while iterating StringView

Summary:
`quoteStringForJSON` was operating via indexed access on `StringView`,
performing an `isASCII()` check every iteration and leading to slow
quoting during `JSON.stringify`.

Modify the function to take `UTF16Ref` or `ASCIIRef` directly,
so that it knows the type.

This increases code size slightly while resulting in significant
speedups in `JSON.stringify`.

Reviewed By: neildhar

Differential Revision: D46117526

fbshipit-source-id: e6b849fc8b4e2e748e05d277e36462b8d97ae095

Remove register stack size override in hermes.cpp (facebook#969)

Co-authored-by: Neil Dhar <[email protected]>
Co-authored-by: Mike Duminy <[email protected]>
resolved: facebook#923

Deploy 0.202.0 to xplat

Summary: Changelog: [Internal]

Reviewed By: panagosg7

Differential Revision: D44155581

fbshipit-source-id: 358df8c40395812216afef1c99f93c576a425b11

Increase default max stack size (facebook#923)

Summary:
As discussed in facebook#135, the default stack size doesn't work for all use cases. In particular, when very large and complex bundles are loaded in dev mode.

This PR bumps the default stack size from `64*1024` (512kB) to `128*1024` (1MB). As suggested by tmikov in this comment - facebook#135 (comment).

Pull Request resolved: facebook#923

Reviewed By: tmikov

Differential Revision: D43630032

Pulled By: neildhar

fbshipit-source-id: 5f8cff91a5f01b6507870c61efa1ce507de67940

Refactor HBC test helper

Summary:
Provide a new API in the test helper, `bytecodeModuleForSource`. This
will return the module rather than the bytecode itself. With this new
API, refactor `bytecodeForSource` to internally call into it. We will be
using `bytecodeModuleForSource` in the next diff for testing purposes.

Reviewed By: tmikov

Differential Revision: D41670281

fbshipit-source-id: 2a6d7fb909a171a279aabcc69333ee09845d9ddd

Re-sync with internal repository (facebook#856)

Co-authored-by: Facebook Community Bot <[email protected]>

type updates and transform node updates

Summary:
This diff:
1) fixes some bugs in the AST types
2) splits some ambiguous node types into more specific types (eg `ObjectTypeProperty` into `ObjectTypePropertySignature` and `ObjectTypeMethodSignature`)
3) refactors node transforms into separate files for cleanliness
4) adds new node creator functions for the aforementioned new node types
5) updates code to use the new functions

Reviewed By: pieterv

Differential Revision: D40921197

fbshipit-source-id: 42330f80814cd002a6cc70fc91915f9f8cfa654b