Fixes issue 10989 where the only the identifier in a member expression that is the value of an object property would be parsed. Removing checkExpressionErrors in parseExprSubscripts results in the subscript also being parsed.
* 🐛 fixed missing errors on assignment pattern in object expression
* ♻️ remove a non-needed comment
* 🐛 missed adding comma in the test input
* 🐛 fixed the failing valid-property-initializer test
* Disallow escape sequences in async
* Disallow escape sequences in get, set and async in class
* invalid escape tests
* Update whitelist
* tests for async in parens
* Add test for invalid newline between params and arrow
* Move canInsertSemilcolon() into shouldPArseAsyncArrow
