Fix: Update dependencies for cloud builder and correct CHANGELOG to Node.js 20

[huangjeff5]

Summary

• Node.js 20: Corrected CHANGELOG and runtime configurations to target Node.js 20 (since Node.js 22 is not yet supported in the environment).
• Build Dependencies: Moved typescript, @types/node, and @types/jest into dependencies in functions/package.json so that production npm install on the Cloud Builder worker can successfully execute the prepare (tsc) build step.

Tested and verified publish with Firebase Extensions CLI.

[gemini-code-assist]

Code Review

This pull request updates the CHANGELOG to specify Node.js 20, removes 'jest' from the TypeScript types configuration, and moves '@types/jest' and '@types/node' to production dependencies. The feedback recommends keeping '@types/jest' in 'devDependencies' to avoid unnecessarily bloating production dependencies, as it is no longer required for compiling production code.

[huangjeff5]

Thanks @gemini-code-assist! Great spot. Now that tsconfig.json only targets ["node"], @types/jest is no longer needed for compiling production code.

I've moved @types/jest back to devDependencies in the latest commit while keeping typescript and @types/node in dependencies for the Cloud Builder's prepare step.

[gemini-code-assist]

That sounds like a solid plan. Keeping @types/jest in devDependencies while ensuring typescript and @types/node are available for the build process is the correct approach for maintaining a clean production dependency tree. Thanks for the update!