Add early error cases for `async async` in property definitions

* Split order tests for RegExp#flags

* small fixes for RegExp named groups

* Remove invalid syntax

* The test mustn't include the global flag

This script is intended to identify common test file formatting errors
prior to their acceptance into the project. It is designed to support
future extensions for additional validation rules.

for-await-of: dstr-binding templates

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

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

Cleanup prop desc tests in the Array folder

Update RegExp#dotAll tests

Split tests for lookbehind

Tests for the stage 3 proposal at
https://tc39.github.io/proposal-regexp-lookbehind/

Tests ported from V8, written by @hashseed

This is a convenience function which tries to make tests easier
to read and write.

Proposal from @mathiasbynens at https://github.com/tc39/proposal-regexp-dotall-flag and https://tc39.github.io/proposal-regexp-dotall-flag/

Tests against the Stage 3 named capture groups proposal
https://tc39.github.io/proposal-regexp-named-groups

Avoid using $ERROR in test files

Remove duplicate

same es src/dstr-assignment/array-elem-target-simple-strict.case

* Update github-deploy-key

* Update deploy.sh

Update templates for function forms