Upgrade intl to 0.20.0 from 0.19.0

[utkuvrs]

Is your feature request related to a problem? Please describe.
Trying to use feedback with intl 0.20.0 but it's requires 0.19.0 instead.

Describe the solution you'd like
I'd like the version to accept intl 0.20.0 as well.

Describe alternatives you've considered
I've tried using 0.19.0 but it requires me to downgrade another package: (table_calendar)

Additional context
Add any other context or screenshots about the feature request here.

Because no versions of feedback match >3.1.0 <4.0.0 and feedback 3.1.0 depends on flutter_localizations from sdk, feedback ^3.1.0 requires flutter_localizations from sdk.
And because every version of flutter_localizations from sdk depends on intl 0.19.0, feedback ^3.1.0 requires intl 0.19.0.
So, because <package-name> depends on both intl ^0.20.0 and feedback ^3.1.0, version solving failed.

[ueman]

Until it's fixed, you can just use a dependency override to make it work.