• Fixes bug where functions' memory configurations weren't preserved in batched function deploys (#4253).
• Adds --local flag to ext:install, ext:update, ext:configure, and ext:uninstall, to save changes to firebase.json instead of deploying immediately.
• ext:export now uses stable ordering for params in .env files (#4256).
• Adds alerting event provider (#4258).
• Fixes bug where project-specific environment variables weren't loaded by the Functions Emulator (#4273).
• Fixes bug where CORS was enabled too broadly on the Functions emulator (#4294).
• Adds rewriteTo / copyTo endpoints to Cloud Storage Emulator (#3647, #3751).
• Addes createReadStream support to Cloud Storage Emulator (#3469).
• Fixes list endpoint in Cloud Storage Emulator (#3647).
• Fixes getFiles for Cloud Storage Emulator (#3778).
• Fixes exists for Cloud Storage Emulator (#3764).