refactor: remove unnecessary padEnd & padStart shims

Both features are already supported in Node.js v8+

Author: haoqunjiang

packages/@vue/cli-service/lib/commands/help.js

@@ -1,5 +1,4 @@
 const { chalk } = require('@vue/cli-shared-utils')
-const padEnd = require('string.prototype.padend')
 const getPadLength = require('../util/getPadLength')
 
 module.exports = (api, options) => {
@@ -23,7 +22,7 @@ module.exports = (api, options) => {
       if (name !== 'help') {
         const opts = commands[name].opts || {}
         console.log(`    ${
-          chalk.blue(padEnd(name, padLength))
+          chalk.blue(name.padEnd(padLength))
         }${
           opts.description || ''
         }`)
@@ -47,7 +46,7 @@ module.exports = (api, options) => {
         const padLength = getPadLength(opts.options)
         for (const [flags, description] of Object.entries(opts.options)) {
           console.log(`    ${
-            chalk.blue(padEnd(flags, padLength))
+            chalk.blue(flags.padEnd(padLength))
           }${
             description
           }`)

packages/@vue/cli-service/package.json

@@ -66,7 +66,6 @@
     "read-pkg": "^5.1.1",
     "slash": "^3.0.0",
     "ssri": "^7.1.0",
-    "string.prototype.padend": "^3.0.0",
     "terser-webpack-plugin": "^2.2.1",
     "thread-loader": "^2.1.3",
     "url-loader": "^2.2.0",

packages/@vue/cli-shared-utils/lib/logger.js

@@ -1,7 +1,6 @@
 const chalk = require('chalk')
 const stripAnsi = require('strip-ansi')
 const readline = require('readline')
-const padStart = require('string.prototype.padstart')
 const EventEmitter = require('events')
 
 exports.events = new EventEmitter()
@@ -20,7 +19,7 @@ const format = (label, msg) => {
   return msg.split('\n').map((line, i) => {
     return i === 0
       ? `${label} ${line}`
-      : padStart(line, stripAnsi(label).length)
+      : line.padStart(stripAnsi(label).length)
   }).join('\n')
 }
 

packages/@vue/cli-shared-utils/package.json

@@ -31,7 +31,6 @@
     "request": "^2.87.0",
     "request-promise-native": "^1.0.8",
     "semver": "^6.1.0",
-    "string.prototype.padstart": "^3.0.0",
     "strip-ansi": "^6.0.0"
   },
   "publishConfig": {

yarn.lock

@@ -15891,24 +15891,6 @@ string-width@^4.0.0, string-width@^4.1.0, string-width@^4.2.0:
     is-fullwidth-code-point "^3.0.0"
     strip-ansi "^6.0.0"
 
-string.prototype.padend@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/string.prototype.padend/-/string.prototype.padend-3.0.0.tgz#f3aaef7c1719f170c5eab1c32bf780d96e21f2f0"
-  integrity sha1-86rvfBcZ8XDF6rHDK/eA2W4h8vA=
-  dependencies:
-    define-properties "^1.1.2"
-    es-abstract "^1.4.3"
-    function-bind "^1.0.2"
-
-string.prototype.padstart@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/string.prototype.padstart/-/string.prototype.padstart-3.0.0.tgz#5bcfad39f4649bb2d031292e19bcf0b510d4b242"
-  integrity sha1-W8+tOfRkm7LQMSkuGbzwtRDUskI=
-  dependencies:
-    define-properties "^1.1.2"
-    es-abstract "^1.4.3"
-    function-bind "^1.0.2"
-
 string.prototype.trimleft@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/string.prototype.trimleft/-/string.prototype.trimleft-2.1.0.tgz#6cc47f0d7eb8d62b0f3701611715a3954591d634"