Thanks to @anba for spotting this: https://github.com/tc39/test262/pull/1014/files/4843f049fafb6cdd61e3be011e3701cc94a9fe46#r116528031

Fix features flags

Add templates for dstr-binding w/ for-await-of looping over async iterators

Assert iterators are consumed - and closed - in dstr patterns

Ref https://bugzilla.mozilla.org/show_bug.cgi?id=1364608

for-await-of: dstr-binding, error, async func & async gen templates

The proposal is no longer on Stage 3 neither in active development.

From https://github.com/tc39/ecmascript_simd

> SIMD.js has been taken out of active development in TC39 and removed from Stage 3, and is not being pursued by web browsers for implementation.

Closes #1019

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>

Set a proper length reference to avoid conflict with browsers

In browsers length is a valid property of window, so they would have a normal
completion instead of a ReferenceError

* Add tests for Promises rejection queue

These basic tests assert the rejection is captured but a later queued job
from a chain of then calls.

* fixup! Add tests for Promises rejection queue

Expression statement lookahead restriction and identifier tests

Lexical redeclarations in block- and switch-statements

Background feedback from @anba:

In https://tc39.github.io/ecma262/#sec-switch-statement-static-semantics-lexicallydeclarednames, all lexically declared names from the different case clauses are combined.
For each case clause, the LexicallyDeclaredNames definition from https://tc39.github.io/ecma262/#sec-block-static-semantics-lexicallydeclarednames applies, which has:

```
StatementListItem : Declaration
  1. Return the BoundNames of Declaration.
```

And in https://tc39.github.io/ecma262/#prod-Declaration we've got:

```
Declaration[Yield, Await] : HoistableDeclaration[?Yield, ?Await, ~Default]
```

And in https://tc39.github.io/ecma262/#prod-HoistableDeclaration:

```
HoistableDeclaration[Yield, Await, Default] : FunctionDeclaration[?Yield, ?Await, ?Default]
```

And the BoundNames of a FunctionDeclaration is its BindingIdentifier https://tc39.github.io/ecma262/#sec-function-definitions-static-semantics-boundnames.

And there's also B3.3.5 (https://tc39.github.io/ecma262/#sec-switch-duplicates-allowed-static-semantics) which allows duplicate FunctionDeclarations in sloppy mode in switch-statements.

Switch to assert-lib in intl402

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>