Update Rack RBS to 2.2.4

[ParadoxV5]

This PR updates rack RBS to Rack 2.2.4 by incorporating diffs between 2.2.2 and 2.2.4.

This PR directly git mv the 2.2.2 RBS and _test files to the 2.2.4 directory. Because Rack’s RBS has untyped entries and potentially-incorrect types (#210), I determined it is not suitable for production (yet?) and did not keep the 2.2.2 directory. This PR does not address the aforementioned content issues.

I ran steep check using Bundler (to constraint Rack’s version to 2.2.4, Gemfile/.lock not checked in) and No type error detected. 🧋

[pocke]

Could you move the directory from rack/2.2.2/ to rack/2.2.4/?

Basically, the version should be MAJOR.MINOR, but without a patch version. Patch versions don't have interface changes in most cases, so it is not necessary that we make other directories for each patch version.

https://github.com/ruby/gem_rbs_collection/blob/dc7059ea0cdf67f486ca9cea2b01d53f04724652/docs/CONTRIBUTING.md#generate-a-boilerplate

[ParadoxV5]

Could you move the directory from rack/2.2.2/ to rack/2.2.4/?

Aren’t they already moved, @pocke? Or did you mean to move to rack/2.2?

Patch versions don't have interface changes in most cases

That is correct. IIRC, there were no method changes between 2.2.2 and 2.2.4, although there were minor differences in the exposed internals that one could (but unlikely would) use.

[pocke]

Aren’t they already moved, @pocke? Or did you mean to move to rack/2.2?

Ah, sorry. I meant moving to rack/2.2 🙈 Could you rename the directory?

[ParadoxV5]

👌

[pocke]

Thanks!