Ensure package name is set

Author: glopesdev

harp/schema.py

@@ -8,6 +8,9 @@
 
 
 def _read_common_registers() -> Registers:
+    if __package__ is None:
+        raise ValueError("__package__ is None: unable to read common registers")
+
     file = resources.files(__package__) / "common.yml"
     with file.open("r") as fileIO:
         return parse_yaml_raw_as(Registers, fileIO.read())