Could not find TypeScript declaration for '../vendor/paho-mqtt'

If you are using TypeScript and you try to install the latest version of aws-amplify you will see the following error:

/Users/username/WebstormProjects/my-project/node_modules/@aws-amplify/pubsub/lib/Providers/MqttOverWSProvider.d.ts
(1,23): Could not find a declaration file for module '../vendor/paho-mqtt'. '/Users/username/WebstormProjects/my-project/node_modules/@aws-amplify/pubsub/lib/vendor/paho-mqtt.js' implicitly has an 'any' type.
  Try `npm install @types/aws-amplify__pubsub` if it exists or add a new declaration (.d.ts) file containing `declare module 'aws-amplify__pubsub';`

Trying to install@types/aws-amplify__pubsub doesnt help as it doesnt exist so the solution is to declare it yourself.

To Reproduce

1. Error happens when starting up (npm start) a Create React App TypeScript project

Expected behavior No loading errors

Desktop (please complete the following information):

• OS: OSX
• Browser: n/a
• Version: n/a

[chris-ramon]

• A temporary fix, working for us:

  npm install @types/paho-mqtt --save-dev
  

  Update your tsconfig.json:

  +  "files": [
  +    "./node_modules/@types/paho-mqtt/index.d.ts"
  +   ]
  

[orcunorcun]

Same issue with

"amazon-cognito-identity-js": "3.2.0",
"aws-amplify": "1.2.4",
"aws-amplify-react-native": "2.2.3",
"react": "16.8.1",
"react-native": "0.61.3",

error: bundling failed: Error: Unable to resolve module ../vendor/paho-mqtt from node_modules/@aws-amplify/pubsub/lib/Providers/MqttOverWSProvider.js:

None of these files exist:

• node_modules/@aws-amplify/pubsub/lib/vendor/paho-mqtt(.native|.ios.js|.native.js|.js|.ios.json|.native.json|.json|.ios.ts|.native.ts|.ts|.ios.tsx|.native.tsx|.tsx)
• node_modules/@aws-amplify/pubsub/lib/vendor/paho-mqtt/index(.native|.ios.js|.native.js|.js|.ios.json|.native.json|.json|.ios.ts|.native.ts|.ts|.ios.tsx|.native.tsx|.tsx)