chore: update deps

Author: Akryum

.babelrc

@@ -1,6 +1,5 @@
 {
   "presets": [
-    ["env", { "modules": false }],
-    "stage-0"
+    ["@babel/env", { "modules": false }]
   ]
 }

build/rollup.config.base.js

@@ -3,7 +3,7 @@ import resolve from 'rollup-plugin-node-resolve'
 import vue from 'rollup-plugin-vue'
 import cjs from 'rollup-plugin-commonjs'
 import replace from 'rollup-plugin-replace'
-import eslint from 'rollup-plugin-eslint'
+import { eslint } from 'rollup-plugin-eslint'
 import fs from 'fs'
 import CleanCSS from 'clean-css'
 
@@ -28,9 +28,6 @@ export default {
     }),
     babel({
       exclude: 'node_modules/**',
-      'plugins': [
-        'external-helpers',
-      ],
     }),
     replace({
       VERSION: JSON.stringify(config.version),

build/rollup.config.browser.js

@@ -1,6 +1,5 @@
 import base from './rollup.config.base'
-import uglify from 'rollup-plugin-uglify'
-import { minify } from 'uglify-es'
+import { terser } from 'rollup-plugin-terser'
 
 const config = Object.assign({}, base, {
   output: {
@@ -11,6 +10,6 @@ const config = Object.assign({}, base, {
   },
 })
 
-config.plugins.push(uglify({}, minify))
+config.plugins.push(terser({}))
 
 export default config