bug: deno's linter should allow ts-expect-error

[balupton]

I'm working on a pull request to deno that uses // @ts-expect-error to allow tests to be able to say "we know that the following code has a type error, but that is the point, we want to test the code against invalid types"

/ref typescript-eslint/typescript-eslint#2093

/moved from denoland/deno#6454

[balupton]

nevermind, seems if you include the error description like so // @ts-expect-error the error we are expecting then the linter passes