update docs and add proptype validation for hideHeader (#65)

update docs and add prop type validation for hideHeader

package.json

 {
   "name": "@edx/paragon",
-  "version": "1.1.2",
+  "version": "1.1.3",
   "description": "Accessible, responsive UI component library based on Bootstrap.",
   "main": "src/index.js",
   "author": "arizzitano",

src/Table/README.md

@@ -11,6 +11,7 @@ Provides a very basic table component with col-scoped headings displayed in the
 2. `key` (string; required) maps that label to its corresponding datum for each row in `data`, to ensure table data are displayed in their appropriate columns.
 3. `columnSortable` (boolean; optional) specifies at the column-level whether the column is sortable. If `columnSortable` is `true`, a sort button will be rendered in the column table heading. It is only required if `tableSortable` is set to `true`.
 4. `onSort` (function; conditionally required) specifies what function is called when a sortable column is clicked. It is only required if the column's `columnSortable` is set to `true`.
+5. `hideHeader` (boolean; optional) specifies at the column-level whether the column label is visible. A column that is sortable cannot have its label be hidden.
 
 The order of objects in `columns` specifies the order of the columns in the table.
 

src/Table/index.jsx

@@ -152,6 +152,7 @@ Table.propTypes = {
     ]).isRequired,
     columnSortable: isRequiredIf(PropTypes.bool, props => props.tableSortable),
     onSort: isRequiredIf(PropTypes.func, props => props.columnSortable),
+    hideHeader: PropTypes.bool,
   })).isRequired,
   headingClassName: PropTypes.arrayOf(PropTypes.string),
   tableSortable: PropTypes.bool,