Update .gitignore

Author: ndrezn

.gitignore

@@ -2,7 +2,7 @@
 0.html
 iframe_figures/
 packages/python/plotly/plotly/tests/test_orca/images/linux/failed/
-
+*.DS_Store
 *.egg-info
 
 *.pyc
@@ -62,3 +62,7 @@ packages/python/plotly/jupyterlab_plotly/nbextension/index.js*
 
 test/percy/*.html
 test/percy/pandas2/*.html
+
+# Build artifacts
+packages/python/plotly/plotly/package_data/datasets/amphibians.csv.gz
+packages/python/plotly/plotly/package_data/datasets/dow_jones_index.csv.gz