Add CoreML iOS updates (#121)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Ayush Chaurasia <ayush.chaurarsia@gmail.com>

ultralytics/nn/tasks.py

@@ -89,7 +89,7 @@ class DetectionModel(BaseModel):
             LOGGER.info(f"Overriding model.yaml nc={self.yaml['nc']} with nc={nc}")
             self.yaml['nc'] = nc  # override yaml value
         self.model, self.save = parse_model(deepcopy(self.yaml), ch=[ch], verbose=verbose)  # model, savelist
-        self.names = [str(i) for i in range(self.yaml['nc'])]  # default names
+        self.names = {i: f'{i}' for i in range(self.yaml['nc'])}  # default names dict
         self.inplace = self.yaml.get('inplace', True)
 
         # Build strides