feat(cli): generate changelog before release

packages/vant-cli/src/commands/changelog.ts

@@ -51,8 +51,7 @@ export function changelog() {
 
   conventionalChangelog(
     {
-      preset: 'angular',
-      releaseCount: 2
+      preset: 'angular'
     },
     null,
     null,

packages/vant-cli/src/compiler/vant-cli-release-plugin.ts

@@ -1,6 +1,7 @@
 // @ts-ignore
 import releaseIt from 'release-it';
 import { build } from '../commands/build';
+import { changelog } from '../commands/changelog';
 
 class VantCliReleasePlugin extends releaseIt.Plugin {
   async beforeRelease() {
@@ -8,6 +9,7 @@ class VantCliReleasePlugin extends releaseIt.Plugin {
     console.log('');
 
     await build();
+    changelog();
   }
 }