add synth import back in

Author: stes

cebra/datasets/__init__.py

@@ -96,6 +96,7 @@ def get_datapath(path: str = None) -> str:
     from cebra.datasets.gaussian_mixture import *
     from cebra.datasets.hippocampus import *
     from cebra.datasets.monkey_reaching import *
+    from cebra.datasets.synthetic_data import *
 except ModuleNotFoundError as e:
     warnings.warn(f"Could not initialize one or more datasets: {e}. "
                   f"For using the datasets, consider installing the "