This improves the load time of most brew commands. For an example of
one of the simplest commands this speeds up:
Without Bootsnap:
```
$ hyperfine 'git checkout master; brew help' 'git checkout optimise_requires; brew help'
Benchmark 1: git checkout master; brew help
Time (mean ± σ): 525.0 ms ± 35.8 ms [User: 229.9 ms, System: 113.1 ms]
Range (min … max): 465.3 ms … 576.6 ms 10 runs
Benchmark 2: git checkout optimise_requires; brew help
Time (mean ± σ): 383.3 ms ± 25.1 ms [User: 133.0 ms, System: 72.1 ms]
Range (min … max): 353.0 ms … 443.6 ms 10 runs
Summary
git checkout optimise_requires; brew help ran
1.37 ± 0.13 times faster than git checkout master; brew help
```
With Bootsnap:
```
$ hyperfine 'git checkout master; brew help' 'git checkout optimise_requires; brew help'
Benchmark 1: git checkout master; brew help
Time (mean ± σ): 386.0 ms ± 30.9 ms [User: 130.2 ms, System: 93.8 ms]
Range (min … max): 359.5 ms … 469.3 ms 10 runs
Benchmark 2: git checkout optimise_requires; brew help
Time (mean ± σ): 330.2 ms ± 32.4 ms [User: 93.4 ms, System: 73.0 ms]
Range (min … max): 302.9 ms … 413.9 ms 10 runs
Summary
git checkout optimise_requires; brew help ran
1.17 ± 0.15 times faster than git checkout master; brew help
```
- This should fix https://github.com/Homebrew/homebrew-core/actions/runs/9839505520, that is:
```
Parameter 'tag': Expected type Float, got type String with value "2024-07-05"
Caller: /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11473/lib/types/private/methods/call_validation.rb:215
Definition: /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/bump-formula-pr.rb:445 (Homebrew::DevCmd::BumpFormulaPr#fetch_resource_and_forced_version)
```
- I think I read https://sorbet.org/docs/sigs#rest-parameters too literally,
yes Sorbet expands the kwargs into a hash type, but it's the value type that
needs specifying in the sig (which for us is `String`).
- Sixteen months ago in PR 14921, I made it so that CI ran
`brew typecheck --update --suggest-typed` and could commit the changes.
- Except it never actually ever made any changes because of the `--dry` option
in the Spoom CLI args. Whoops!
