Set VSCode to format (black and isort) on file save (#308)

.gitignore

-.vscode/
 .DS_Store
 # Byte-compiled / optimized / DLL files
 __pycache__/
@@ -132,4 +131,4 @@ dmypy.json
 .pyre/
 
 # Jetbrains
-.idea
+.idea
\ No newline at end of file

.vscode/settings.json

+{
+    "python.formatting.provider": "black",
+    "editor.formatOnSave": true,
+    "editor.codeActionsOnSave": {
+        "source.organizeImports": true,
+    },
+}
\ No newline at end of file