new ts operator to do type checking

[trim21]

https://devblogs.microsoft.com/typescript/announcing-typescript-4-9/#the-satisfies-operator

export default {} satisfies TriggerSet<Data>

This looks clear than assignment, but looks like it doesn't check extra property, like typo triggers trigger

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currently ts 4.9 doesn't work with ttypescript

[quisquous]

Ooh, that's really nice.