v0.0.13

• Replace all interface{} with any in protocol/operation.go and protocol/operations.go

• Fix MarshalJSON to use op directly instead of op.Data() type assertion

• Align with Go 1.18+ modern code style

• Add comprehensive documentation for Operation.Data() method

• Include return type explanations (known vs unknown operations)

• Provide 5 best practice examples:

  • Type assertion based on operation type
  • Safe type assertion with error handling
  • Handling unknown operations
  • Direct operation access
  • Iterating over operations

• Add important notes about type safety and performance

• Use modern Go style (any instead of interface{})