Merge pull request #87 from ym-pett/tidy_selector_imports

chore: fixed compliant selectors import & updated Contributing

Author: MarcoGorelli

CONTRIBUTING.md

@@ -49,6 +49,12 @@ To run type-checking:
 pyright narwhals_daft
 ```
 
+If your changes add new functionalities, update the tests:
+
+```console
+python update_run_tests.py
+```
+
 ## Updating the Narwhals submodule
 
 Run

narwhals_daft/selectors.py

@@ -2,7 +2,7 @@
 
 from typing import TYPE_CHECKING
 
-from narwhals._compliant import CompliantSelector, CompliantSelectorNamespace
+from narwhals.compliant import CompliantSelector, CompliantSelectorNamespace
 
 from narwhals_daft.expr import DaftExpr