style: fix eslint problems in browser rollup config

Author: lihsai0

packages/browser/rollup.config.js

@@ -2,31 +2,32 @@ import typescript from 'rollup-plugin-typescript2'
 import resolve from '@rollup/plugin-node-resolve'
 import commonjs from '@rollup/plugin-commonjs'
 import { babel } from '@rollup/plugin-babel'
+
 import pkg from './package.json'
 
 const baseOutputOptions = {
-	sourcemap: true,
-	name: pkg.jsName
+  sourcemap: true,
+  name: pkg.jsName
 }
 
 const umdOutputOptions = {
-	...baseOutputOptions,
-	file: pkg.main,
-	format: 'umd',
-	name: 'qiniu-js'
+  ...baseOutputOptions,
+  file: pkg.main,
+  format: 'umd',
+  name: 'qiniu-js'
 }
 
 export default [
-	{
-		input: 'src/index.ts',
-		plugins: [
-			resolve({ browser: true }),
-			commonjs(),
-			typescript(),
-			babel({ babelHelpers: 'bundled' })
-		],
-		output: [
-			umdOutputOptions
-		]
-	}
+  {
+    input: 'src/index.ts',
+    plugins: [
+      resolve({ browser: true }),
+      commonjs(),
+      typescript(),
+      babel({ babelHelpers: 'bundled' })
+    ],
+    output: [
+      umdOutputOptions
+    ]
+  }
 ]