fresh 0.4.4

fresh: ^0.4.4 copied to clipboard

• refactor: minor adjustment to generics in test
• chore(deps): upgrade to mocktail ^1.0.0

• fix: wait for initial storage read before returning token
• chore: update copyright year
• chore: add funding to pubspec.yaml
• ci: revamp ci setup

• chore: adjust dart sdk constraint to ">=2.12.0 <4.0.0"
• chore: use more strict analysis options

• chore: upgrade dev dependencies
  • upgrade to mocktail ^0.3.0

• BREAKING: Migrate to Dart 2.12.0 with Null Safety

• BREAKING: Remove Token interface
• refactor: FreshMixin internal implementation improvements

• Add InMemoryTokenStorage
• Add TokenHeaderBuilder typedef

• BREAKING: split dio interceptor into separate package (fresh_dio)
  • package:fresh is repurposed to contain core refresh components

• Improvements to internal implementation
• Fully Unit Tested

• Fix: expose DioErrors to shouldRefresh function (#9)

• BREAKING: convert to dio interceptor.

Initial Release of the library.

• Includes FreshClient with built-in token refresh.