fix(usegroupby): column.disableGrouping inverted logic (#1596)

unlike other hooks, the column.disableGrouping actually enabled grouping for a column

docs/api.md

@@ -575,8 +575,8 @@ The following options are supported on any `Column` object passed to the `column
   - Must return valid JSX
   - This function (or component) formats this column's value when it is being grouped and aggregated, eg. If this column was showing the number of visits for a user to a website and it was currently being grouped to show an **average** of the values, the `Aggregated` function for this column could format that value to `1,000 Avg. Visits`
 - `disableGrouping: Boolean`
-  - Defaults to `true`
-  - If `true`, this column is able to be grouped.
+  - Defaults to `false`
+  - If `true`, will disable grouping for this column.
 
 ### Instance Properties
 

src/plugin-hooks/useGroupBy.js

@@ -93,7 +93,7 @@ function useMain(instance) {
 
     column.canGroupBy = accessor
       ? getFirstDefined(
-          columnDisableGrouping,
+          columnDisableGrouping === true ? false : undefined,
           disableGrouping === true ? false : undefined,
           true
         )