Add update notifier (#17)

Author: iansu

package.json

@@ -50,6 +50,7 @@
     "@types/inquirer": "6.5.0",
     "@types/jest": "^24.9.1",
     "@types/node": "13.5.0",
+    "@types/update-notifier": "^2.5.0",
     "@types/yargs": "15.0.1",
     "@zeit/ncc": "0.21.0",
     "aws-sdk": "2.610.0",
@@ -66,6 +67,7 @@
     "ts-jest": "^25.0.0",
     "ts-node": "8.6.2",
     "typescript": "3.7.5",
+    "update-notifier": "^4.1.0",
     "yargs": "15.1.0"
   }
 }

src/app.ts

@@ -1,6 +1,7 @@
 import inquirer from 'inquirer';
 import chalk from 'chalk';
 import yargs, { Argv } from 'yargs';
+import updateNotifier from 'update-notifier';
 
 import {
   backupConfig,
@@ -14,6 +15,9 @@ import {
 } from './config';
 import getTemporaryCredentials, { ProfileConfiguration, AWSCredentials } from './mfa-login';
 import exportEnvironmentVariables from './exporter';
+import pkg from '../package.json';
+
+updateNotifier({ pkg }).notify();
 
 const profiles = getProfileNames();
 let currentProfile = process.env.AWS_PROFILE || '';