feat: update flutter 3.3.1 and add dependabot

[jamesblasco]

Status

READY

Breaking Changes

NO

Description

• Updates to Flutter 3.3.1 and Dart 2.18.0
• Uses very_good_analysis
• Adds dependabot

Regarding very_good_analysis, I disabled two rules that were used extensively in the library

• library_private_types_in_public_api. A private method is returned in two functions https://github.com/felangel/mocktail/blob/447575a846ccb558abea11e148abe2bd4e96de99/packages/mocktail/lib/src/mocktail.dart#L334
• parameter_assignments. I not sure how to rename the inner variables vs the method parameters https://github.com/felangel/mocktail/blob/447575a846ccb558abea11e148abe2bd4e96de99/packages/mocktail/lib/src/mocktail.dart#L26-L32

Type of Change

• [X] ✨ New feature (non-breaking change which adds functionality)
• [ ] 🛠️ Bug fix (non-breaking change which fixes an issue)
• [ ] ❌ Breaking change (fix or feature that would cause existing functionality to change)
• [ ] 🧹 Code refactor
• [ ] ✅ Build configuration change
• [ ] 📝 Documentation
• [ ] 🗑️ Chore