fix(buttons): update migration version + add changelog entry

Author: adrianptrv

CHANGELOG.md

@@ -2,6 +2,17 @@
 
 All notable changes for each version of this project will be documented in this file.
 
+## 21.0.0
+
+### Themes
+
+- `IgxButton`
+    - **Breaking Change**
+        - The following shadow-related parameters were removed from the `outlined-button-theme` and `flat-button-theme`:
+            - `resting-shadow`
+            - `hover-shadow`
+            - `focus-shadow`
+            - `active-shadow`
 
 ## 20.1.0
 

projects/igniteui-angular/migrations/migration-collection.json

@@ -248,9 +248,9 @@
             "factory": "./update-20_1_0"
         },
         "migration-50": {
-            "version": "20.2.0",
-            "description": "Updates Ignite UI for Angular from v20.1.0 to v20.2.0",
-            "factory": "./update-20_2_0"
+            "version": "21.0.0",
+            "description": "Updates Ignite UI for Angular from v20.1.0 to v21.0.0",
+            "factory": "./update-21_0_0"
         }
     }
 }

…update-20_2_0/changes/theme-changes.json …update-21_0_0/changes/theme-changes.jsonprojects/igniteui-angular/migrations/update-20_2_0/changes/theme-changes.json renamed to projects/igniteui-angular/migrations/update-21_0_0/changes/theme-changes.json projects/igniteui-angular/migrations/update-20_2_0/changes/theme-changes.json renamed to projects/igniteui-angular/migrations/update-21_0_0/changes/theme-changes.json

@@ -3,7 +3,7 @@ import * as path from 'path';
 import { SchematicTestRunner, UnitTestTree } from '@angular-devkit/schematics/testing';
 import { setupTestTree } from '../common/setup.spec';
 
-const version = '20.2.0';
+const version = '21.0.0';
 
 describe(`Update to ${version}`, () => {
     let appTree: UnitTestTree;

…r/migrations/update-20_2_0/index.spec.ts …r/migrations/update-21_0_0/index.spec.tsprojects/igniteui-angular/migrations/update-20_2_0/index.spec.ts renamed to projects/igniteui-angular/migrations/update-21_0_0/index.spec.ts projects/igniteui-angular/migrations/update-20_2_0/index.spec.ts renamed to projects/igniteui-angular/migrations/update-21_0_0/index.spec.ts

@@ -5,7 +5,7 @@ import type {
 } from '@angular-devkit/schematics';
 import { UpdateChanges } from '../common/UpdateChanges';
 
-const version = '20.2.0';
+const version = '21.0.0';
 
 export default (): Rule => async (host: Tree, context: SchematicContext) => {
     context.logger.info(`Applying migration for Ignite UI for Angular to version ${version}`);