v2.0.0-dev.32

• Please refer to https://fzyzcjy.github.io/flutter_rust_bridge/guides/miscellaneous/whats-new for what's changed in V2.
• Support self in non-opaque case (&self already supported before) #1880
• Support &SomeStructOrEnum in non-opaque case (SomeStructOrEnum already supported before) #1880
• Support &str type (String already supported before) #1880
• Support instance and static methods for enums without fields #1879
• Revert stream default semantics to not wait for Rust function execution #1877
• Allow users to customize whether to await for Rust function for streams #1877
• Hint users when a type is automatically inferred as both opaque and non-opaque #1876
• Add check to ensure Rust and Dart has in-sync generated code #1878