Don't prohibit Hash[] syntax

[cllns]

This is in Rubocop v1.10 rubocop/rubocop#9478

It seems like the intention is to prevent Hash[ary] and to encourage ary.to_h instead. But this also sweeps up every use of Hash[]. We have had that Hash[] call in specs we generated for Hanami 1.3 apps. I'd like to see that continue when we do Hanami 2.0 generators.

I personally much prefer Hash[] particularly when it's in a block. The squiqqly braces mean two different things in Ruby: a hash literal or a block. By avoiding using them as hash literal, it make its clear that they're used for blocks most often. (I'm not a purist about this, I just think it's easier to read often. With nested hashes, I often resort to hash literals inside a Hash[] call.)

[cllns]

I just this afternoon added this hanami/devtools Rubocop config (as inherit_from:) to a new project, so great timing @jodosha 😄