fix(lib/webpackConfig): request error, fixes #546

Disable prefetch on electron versions greater than 7 due to electron/electron#21091
The error is the same, but the cause request type is different

Author: nklayman

lib/webpackConfig.js

@@ -41,6 +41,17 @@ async function chainWebpack (api, pluginOptions, config) {
         args[0].__static = JSON.stringify(api.resolve('./public'))
         return args
       })
+      const pkg = require(api.resolve('package.json'))
+      const semver = require('semver')
+      const electronVersion = pkg.devDependencies.electron
+      // Prefetch requests fail on Electron versions greater than 7
+      // https://github.com/nklayman/vue-cli-plugin-electron-builder/issues/546
+      if (
+        /^\^?(\d|\.)*$/.test(electronVersion) &&
+        semver.gte(electronVersion.replace('^', ''), '7.0.0')
+      ) {
+        config.plugins.delete('prefetch')
+      }
     }
     // Apply user config
     rendererProcessChain(config)