This upgrades `utils/curl.rb` to `typed: strict`, which requires
a number of changes to pass `brew typecheck`. The most
straightforward are adding type signatures to methods, adding type
annotations (e.g., `T.let`) to variables that need them, and ensuring
that methods always use the expected return type.
I had to refactor areas where we call a `Utils::Curl` method and use
array destructuring on a `SystemCommand::Result` return value
(e.g., `output, errors, status = curl_output(...)`), as Sorbet
doesn't understand implicit array conversion. As suggested by Markus,
I've switched these areas to use `#stdout`, `#stderr`, and `#status`.
This requires the use of an intermediate variable (`result`) in some
cases but this was a fairly straightforward substitution.
I also had to refactor how `Cask::URL::BlockDSL::PageWithURL` works.
It currently uses `page.extend PageWithURL` to add a `url` attribute
but this reworks it to subclass `SimpleDelegator` and use an
`initialize` method instead. This achieves the same goal but in a way
that Sorbet can understand.
cf22382921