* Add support for declare export
* Do not allow declare module inside declare module
* Reallow module exports outside module
* Add handling of `declare export default`
Add check for multiple module.export declarations
* Disallow export let/const/type
Refactor parsing object properties to share more code and add support
for getters and setters
* Rename tests
* Update test fixtures
* Optimize for performance
* disallow declare export interface outside of module
* Refactor code to be more readable and less lookahead
* Add comments
* Add test for export star as
* Test for number literal getter/setter
* Add more tests
* Fix tests
* Allow union types and correctly eat semi after type
* Use non computed keys
* Fix tests
* Test runner: Detect extra property in 'actual' but not in 'expected'.
Also update all expected.json where this would result in errors.
* Include rmExpected.js script in case it is needed again
* Property variance type annotations for Flow plugin
Non-method properties and indexers of object types, declare class, and
interfaces can be "positive" or "negative." Class fields, but again not
methods, can also have variance.
This PR generalizes the variance annotations for type parameters into a
new node type, and reuses that node for those properties.
The code for object types is reused for interfaces and declare classes.
The changes there are straightfoward.
The code for class fields is reused for object literals, which do not
support variance annotations (currently). This code is a bit sketchy,
because we always parse variance annotations in the `parsePropertyName`
extension, then error in a the subsequent parse phase for object
literals (`parseObjPropValue`) or class methods (`parseClassMethod`).
* Remove bogus unreachable code, clarify variance parsing conditional
* Don't use a new node type for variance annotations
Adding a new node type, specifically changing the TypeParameter node's
variance property to be node-valued, is a breaking change. We might
choose to make this breaking change in a later version.
* s/start/variancePos
