fix: update command & README

Author: LinLzis

README.md

@@ -1,5 +1,10 @@
 # Serverless Warmer
 
+[![npm](https://img.shields.io/npm/v/@slsplus/warmer)](http://www.npmtrends.com/@slsplus/warmer)
+[![NPM downloads](https://img.shields.io/npm/dm/@slsplus/warmer.svg?style=flat-square)](http://www.npmtrends.com/@slsplus/warmer)
+[![Build Status](https://github.com/serverless-tencent/serverless-warmer/workflows/Release/badge.svg?branch=master)](https://github.com/serverless-tencent/serverless-warmer/actions?query=workflow:Release+branch:master)
+[![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
+
 Application Warmer for Serverless Framework.
 
 - [@slsplus/warmer](#Serverless-Warmer)

src/warm.ts

@@ -60,8 +60,7 @@ export async function warm(options: WarmOptions): Promise<boolean> {
 
 const warmCommand = (): void => {
   program
-    .command('warm')
-    .description('Warm up serverless application')
+    .description('Warm up serverless application or function')
     .option('-r, --region [region]', 'region of function', 'ap-guangzhou')
     .option('-n, --name [name]', 'name config in serverless.yml')
     .option('-a, --app [app]', 'app name')