v2.1.0

• Update setup.py for more robust and maintainable package management.
• Update mealpy dependency to v3.0.2 for better performance and compatibility.
• Update GitHub Actions workflows for testing and publishing.
• Update scorer module.
• Update OneHotEncoder and LabelEncoder classes.
• Update TimeSeriesDifferencer, FeatureEngineering, and DataTransformer classes.
• Add more parameters to GfoRvflCV, GfoRvflTuner, and GfoRvflComparator classes include mode, n_workers, and termination.
• Update examples, tests, and documentation.