Move spyderlib/defaults to spyder/defaults

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,6 @@
 Before submitting your pull request be sure that:
 
-1. You haven't touched any file in the `spyderlib/defaults` directory.
+1. You haven't touched any file in the `spyder/defaults` directory.
   - There is *absolutely* no need to touch those files.
   - If you want to add new configuration options, please go to
     `spyder/config/main.py`.

spyder/config/user.py

@@ -265,7 +265,7 @@ def __load_old_defaults(self, old_version):
         """Read old defaults"""
         old_defaults = cp.ConfigParser()
         if check_version(old_version, '3.0.0', '<='):
-            path = get_module_source_path('spyderlib')
+            path = get_module_source_path('spyder')
         else:
             path = osp.dirname(self.filename())
         path = osp.join(path, 'defaults')