Pass unknown CLI flags to the task itself

[mohsen1]

npm requires using -- for passing flags to npm scripts (e.g. npm run-script build -- --production) while yarn and pnpm are more forgiving (pnpm run-script build --production) works.

I think Task should also allow this

[pd93]

Task already has support for -- --production, you just need to specify {{.CLI_ARGS}} in the command. I don't think we can add support for passing unknown flags directly into Task because this stops us from being able to add more flags in the future without potentially breaking things.