chore(cli-service): word spelling in comments (#4367)

Author: yiliang114

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

@@ -75,7 +75,7 @@ module.exports = (api, options) => {
     validateWebpackConfig(webpackConfig, api, options)
 
     // load user devServer options with higher priority than devServer
-    // in webpck config
+    // in webpack config
     const projectDevServerOptions = Object.assign(
       webpackConfig.devServer || {},
       options.devServer
@@ -129,7 +129,7 @@ module.exports = (api, options) => {
         // explicitly configured via devServer.public
         ? `?${publicUrl}/sockjs-node`
         : isInContainer
-          // can't infer public netowrk url if inside a container...
+          // can't infer public network url if inside a container...
           // use client-side inference (note this would break with non-root publicPath)
           ? ``
           // otherwise infer the url

packages/@vue/cli/lib/GeneratorAPI.js

@@ -426,7 +426,7 @@ function renderFile (name, data, ejsOptions) {
     )
 
     // use ejs.render to test the conditional expression
-    // if evaluated to falsy vaule, return early to avoid extra cost for extend expression
+    // if evaluated to falsy value, return early to avoid extra cost for extend expression
     const result = ejs.render(finalTemplate, data, ejsOptions)
     if (!result) {
       return

packages/@vue/cli/lib/upgrade.js

@@ -205,7 +205,7 @@ class Upgrader {
   }
 
   async checkForUpdates () {
-    logWithSpinner('Gathering pacakage information...')
+    logWithSpinner('Gathering package information...')
     const upgradable = await this.getUpgradable()
     stopSpinner()