fix import

Author: TomDonoghue

specparam/analysis/__init__.py

@@ -1,4 +1,4 @@
 """Analysis sub-module for model parameters and related metrics."""
 
 from .error import compute_pointwise_error, compute_pointwise_error_group
-from .periodic import get_band_peak, get_band_peak_group
+from .periodic import get_band_peak, get_band_peak_group, get_band_peak_event