fix(cli): use appName as package.json name on electron project (#2741)

Author: Mike S

cli/src/electron/add.ts

@@ -1,11 +1,18 @@
 import { exec } from 'child_process';
 import { Config } from '../config';
 import { copyTemplate, hasYarn, installDeps, runTask } from '../common';
+import { writeFileSync } from '../util/fs';
+import { join } from 'path';
 
 export async function addElectron(config: Config) {
 
   await runTask(`Adding Electron project in: ${config.electron.platformDir}`, async () => {
-    return copyTemplate(config.electron.assets.templateDir, config.electron.platformDir);
+    const copyReturn = await copyTemplate(config.electron.assets.templateDir, config.electron.platformDir);
+    const capConfigName = require(join(config.app.rootDir, 'capacitor.config.json')).appName;
+    const packageJSONParse = require(join(config.electron.platformDir, 'package.json'));
+    packageJSONParse.name = capConfigName;
+    writeFileSync(join(config.electron.platformDir, 'package.json'), JSON.stringify(packageJSONParse));
+    return copyReturn;
   });
 
   await runTask(`Installing NPM Dependencies`, async () => {