• Add support for secrets to v2 functions (#4451).
• Fixes an issue where ext:export would write different param values than what it displayed in the prompt (#4515).
• Enhances the functions IAM permission process and updates the error messages (#4511).
• Removes logic for automatically pruning stale secrets after function deploys (#4519).
• Adds 'build:watch' npm script to firebase init when initializing a project with Typescript functions.