Align 10.40 (#763)

* docs: fix typo [ci skip]

* docs(tree-view): update expanded nodes guidance

* chore(deps-dev): upgrade carbon-components to v10.40.0

* build(css): omit treeview SCSS import

treeview.scss is included in global styles.css by default in v10.40.0

* feat(date-picker): add helperText prop

Ref: 4b5b5fdf8

docs/src/COMPONENT_API.json

@@ -2734,6 +2734,17 @@
           "constant": false,
           "reactive": false
         },
+        {
+          "name": "helperText",
+          "kind": "let",
+          "description": "Specify the helper text",
+          "type": "string",
+          "value": "\"\"",
+          "isFunction": false,
+          "isFunctionDeclaration": false,
+          "constant": false,
+          "reactive": false
+        },
         {
           "name": "iconDescription",
           "kind": "let",