Allow nightly-only flags in -insiders builds

[weswigham]

Should fix @typescript-bot pack this builds.

[weswigham]

@typescript-bot pack this to test

[typescript-bot]

Heya @weswigham, I've started to run the tarball bundle task on this PR at 540fe5f. You can monitor the build here.

[typescript-bot]

Hey @weswigham, I've packed this into an installable tgz. You can install it for testing by referencing it in your package.json like so:

{
    "devDependencies": {
        "typescript": "https://typescript.visualstudio.com/cf7ac146-d525-443c-b23c-0d58337efebc/_apis/build/builds/115164/artifacts?artifactName=tgz&fileId=3F614C83905E15F2E06E1BDE3EBD22D080C62014176223401104CF224A4B967002&fileName=/typescript-4.6.0-insiders.20211116.tgz"
    }
}

and then running npm install.

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There is also a playground for this build and an npm module you can use via "typescript": "npm:@typescript-deploys/[email protected]".;