chore(ng9): add renamed classes to changelog and migrations

Author: damyanpetev

CHANGELOG.md

@@ -8,10 +8,12 @@ All notable changes for each version of this project will be documented in this
 - Added support for the Ivy renderer.
 - **Breaking Changes** The following classes have been renamed. Using `ng update` will apply automatically migrate your project to use the new names.
     - `IgxDropDownBase` -> `IgxDropDownBaseDirective`
-    - `IgxDropDownItemBase` -> `IgxDropDownBaseDirective`
+    - `IgxDropDownItemBase` -> `IgxDropDownItemBaseDirective`
     - `IgxGridBaseComponent` -> `IgxGridBaseDirective`
     - `IgxRowComponent` -> `IgxRowDirective`
     - `IgxHierarchicalGridBaseComponent` -> `IgxHierarchicalGridBaseDirective`
+    - `IgxMonthPickerBase` -> `IgxMonthPickerBaseDirective`
+    - `IgxBaseExporter` -> `IgxBaseExporterDirective`
 
 - `IgxGrid`, `IgxTreeGrid`, `IgxHierarchicalGrid`
     - **Behavioral Change** - Pinning columns is no longer automatically prevented when the pinning area would exceed the size of the grid.

projects/igniteui-angular/migrations/update-9_0_0/changes/classes.json

@@ -20,6 +20,14 @@
         {
             "name": "IgxHierarchicalGridBaseComponent",
             "replaceWith": "IgxHierarchicalGridBaseDirective"
+        },
+        {
+            "name": "IgxMonthPickerBase",
+            "replaceWith": "IgxMonthPickerBaseDirective"
+        },
+        {
+            "name": "IgxBaseExporter",
+            "replaceWith": "IgxBaseExporterDirective"
         }
     ]
 }

projects/igniteui-angular/src/lib/calendar/calendar-base.ts

@@ -20,6 +20,7 @@ export enum ScrollMonth {
     NONE = 'none'
 }
 
+/** @hidden @internal */
 @Directive({
     selector: '[igxCalendarBase]'
 })