Get ready for Crystal 0.25.0

[Blacksmoke16]

With 0.25.0 coming soon, we need to update some things for the new version.

• Update Dockerfile since crystal deps is being removed. CLI: remove deps command crystal-lang/crystal#5544
• Remove references of JSON::Type. Implement JSON::Any and YAML::Any without recursive aliases crystal-lang/crystal#5183
• File.stat is renamed to File.info Rename and rework File::Stat as File::Info crystal-lang/crystal#5584
• Read the changelog for anything I missed. https://github.com/bcardiff/crystal/blob/changelog/0.25.0/CHANGELOG.md

[robacarp]

@Blacksmoke16 thanks for putting together this list. I read through the list of breaking changes and did some grepping to check if things were needed, and added File.stat to your list.

In addition, I think this change will have some major effects on projects which use Granite:

• Automatic type casting of literals: Explosive birth of automatic casts! crystal-lang/crystal#6074