pin pyarrow and add vscode dir to gitignore (#511)

* pin pyarrow and add vscode dir to gitignore

* Sbachmei/mic 6020/fix breaking test (#513)

* fix test_set_up_dask_clean_existing_cluster

* ignore mypy error

* check cluster prior to setting up as well

* improve test

* pin pyarrow and add vscode dir to gitignore

---------

Co-authored-by: Hussain Jafari <hjafari@uw.edu>
Co-authored-by: Steve Bachmeier <23350991+stevebachmeier@users.noreply.github.com>

Author: 3 people

.gitignore

@@ -129,6 +129,9 @@ dmypy.json
 # Pycharm project settings
 .idea/
 
+# VSCode 
+.vscode/
+
 # Local user jupyter notebooks directory
 notebooks/