New method: ``as_dict``. Returns the _data dictionary.

debexpo/model/plugin_results.py

@@ -101,6 +101,9 @@ class PluginResult(meta.Base):
     def __delitem__(self, key):
         del self._data[key]
 
+    def as_dict(self):
+        return self._data
+
     #
     # Direct access to some attributes
     #