* Refactor emit substitution into transform
* Add reusable state machine for binary expressions
* Allow emitBinary to use state machine for comments/sourcemaps
* Switch core trampoline state back to arrays
* Switch binder to parallel stacks, temporarily partially revert emitBinary
* Add link to benchmark when posting perf results
* Ensure work stacks are per-execution
* Reenable comments and sourcemaps
* Add support for abstract constructor types
* Add backwards-compatible overloads for creating/updating constructor types
* Reverting use of 'abstract' in lib/es5.d.ts due to eslint issues
* Update baseline due to reverting lib
* Add error for failing to mark an mixin class as abstract
* Fix declaration/quick info for abstract construct signatures
