* Fix binding well-known symbols by element access
* Add navigationBar test
* Revert settings.json change
* Accept baselines
* Actually make it bind
* Accept API baselines
* Dont use internal name in API
* migrate nullish coalescing commit
* add more test case
* add branch type check test
* add more tests
* fix nullish precedence
* update public api
* add rescan question question token to fix regression
* update public api baseline
* Added tests that emit for nullish coalescing operator conforming with grammar restrictions when assertions are used.
* Fixed emit to hoist temporary variables (they previously went undeclared).
Added tests to ensure calls and property accesses are only called once.
* use not equal to null
* rename factory
* add grammar check
* fix more cases
* Fix handling of nullish coalescing oprator in expando objects.
* Fixed classifier to support ?? operator.
* update baseline
* accept baseline
* fix review
* update emitter and more testcase
* update control flow
* make linter happy
* update libs
* avoid unnecessary assert
* fix typooo
* Fixes for control-flow analysis
* Start enabling element access special assignment
* Treat element access assignment as special assignment in JS
* Make declarations for bindable element access expressions
* Fix navigationBar crash
* Add multi-level test for JS
* Propagate element access expressions to more code paths
* Fix property access on `this`
* Add quick info test
* Uhhh I guess this is fine
* Fix module["exports"] and property access chained off element access
* Add test for this property assignment
* Add test for and fix prototype property assignment
* Fix teeeest???
* Update APIs
* Fix element access declarations on `this`
* Fix go-to-definition
* Add declaration emit to tests
* Reconcile with late-bound symbol element access assignment
* Fix baselines
* Add JS declaration back to tests
* Fix JS declaration emit of non-late-bound string literal property names
* Revert accidental auto-format
* Use `isAccessExpression`
* Add underscore escaping member to test
* Fix and test navBar changes
* Add support for Optional Chaining
* Add grammar error for invalid tagged template, more tests
* Prototype
* PR feedback
* Add errors for invalid assignments and a trailing '?.'
* Add additional signature help test, fix lint warnings
* Fix to insert text for completions
* Add initial control-flow analysis for optional chains
* PR Feedback and more tests
* Update to control flow
* Remove mangled smart quotes in comments
* Fix lint, PR feedback
* Updates to control flow
* Switch to FlowCondition for CFA of optional chains
* Fix ?. insertion for completions on type variables
* Accept API baseline change
* Clean up types
* improve control-flow debug output
* Revert Debug.formatControlFlowGraph helper
