* Add error recovery support to @babel/parser
* Update @babel/parser tests to always recover from errors
* Update this.raise usage in @babel/parser:
- expression.js
- lval.js
- statement.js
- estree.js
- flow.js
- jsx/index.js
- tokenizer/index.js
* Update @babel/parser fixtures with recovered errors
* Fix tests out of @babel/parser
* Do not use try/catch for control flow
* Update invalid fixtures
* Do not report invalid lhs in toAssignable
* Do not validate function id multiple times
* Dedupe reserved await errors
* Remove duplicate errors about strict reserved bindings
* Remove duplicated error about yield/await inside params
* Don't error twice for methods in object patterns
* Don't report invalid super() twice
* Remove dup error about reserved param for expr arrows
* Remove double escapes in migrated tests
* Dedupe errors about invalid escapes in identifiers
* Remove duplicated error about decorated constructor
* Remove duplicated error about spread in flow class
* Don't throw for invalid super usage
* Don't fail for object decorators with stage 2
* Fix flow inexact type errors
* Fix flow
* Fix errors about escapes in keywords (ref: #10455)
* Update after rebase
* Fix todo
* Remove duplicated error when using += for defaults
* Remove unnecessary throw
* Nit: use ??
Eg, `namespace:foo.bar` used to parse but is invalid in the [spec](https://facebook.github.io/jsx/).
Also, allow `JSXNamespacedName` in the `JSXOpeningElement`/`JSXClosingElement` builders.
