tscv 1.0.1

• Added test_seasonality() to test for seasonality at a specified frequency using the autocorrelation-based procedure from the M4 Forecasting Competition.
• Added forecast_naive2() to generate Naive2 benchmark forecasts using conditional seasonal adjustment.
• Added NAIVE2() and supporting S3 methods to integrate the Naive2 benchmark with the fabletools model interface, including forecast distributions, fitted values and residuals.
• Expanded the package documentation with references covering time series cross-validation, forecast accuracy measures, and benchmark forecasting methods.

tscv 1.0.0

• Initial CRAN submission.