Update intl dependency to support Flutter 3.32.0

[yosefor]

The kosher_dart package currently depends on intl ^0.19.0, which creates a dependency conflict with Flutter 3.32.0 that requires intl ^0.20.2.

Error Message

Because every version of kosher_dart from git depends on intl ^0.19.0 and hadar_program depends on intl ^0.20.2, kosher_dart from git is forbidden.
So, because hadar_program depends on kosher_dart from git, version solving failed.

Environment

• Flutter: 3.32.0
• Dart: (current stable)
• kosher_dart: latest from git

Expected Behavior

The package should work with current Flutter versions without dependency conflicts.

Proposed Solution

Please update the pubspec.yaml to support newer intl versions:

dependencies:
  intl: ^0.20.0  # or intl: ">=0.19.0 <0.21.0" for broader compatibility

Additional Context

Flutter 3.32.0 pins intl to version 0.20.2 via flutter_localizations, making it impossible to use kosher_dart in current Flutter projects.

Thank you for maintaining this package!

[yosefor]

I've created a pull request to fix this issue: #51

Summary of fixes:

• Updated intl dependency from ^0.19.0 to ^0.20.0
• Fixed broken JewishCalendar.initDate constructor
• All tests now pass including Daf Yomi calculations

The PR is ready for review! 🚀