replaced | dict merge with unpacking for compatibility with python 3.8

Author: kaseylove

src/rushd/ddpcr.py

@@ -79,7 +79,7 @@ def load_ddpcr_metadata(unzipped_path: Path) -> Dict[Any, Any]:
             target_map = {
                 p["Dye"]["DyeName"] + "_target": p["TargetName"] for p in w["Panel"]["Targets"]
             }
-            metadata_from_plt[well] = condition_map | target_map
+            metadata_from_plt[well] = {**condition_map, **target_map}
 
     metadata_map = pd.DataFrame.from_dict(metadata_from_plt, orient="index").to_dict()
     return metadata_map
@@ -143,7 +143,7 @@ def load_ddpcr(
 
     # Load metadata from .ddpcr file
     if extract_metadata:
-        metadata_map = metadata_map | load_ddpcr_metadata(tmp_data_path)
+        metadata_map = {**metadata_map, **load_ddpcr_metadata(tmp_data_path)}
 
     # Load data for each well
     data_list = []

src/rushd/flow.py

@@ -58,7 +58,7 @@ def load_well_metadata(yaml_path: Union[str, Path]) -> Dict[Any, Any]:
 
     Parameters
     ----------
-    yaml_path: Path 
+    yaml_path: Path
         Path to the .yaml file to use for associating metadata with well IDs.
 
     Returns