title: Could not find a declaration file for third party modules - how to declare and resolve these errors
body: <p>I am working on a project with typescript (generated with vue cli 3.0).</p>
  
  <p>When I import third party modules, I get errors such as:</p>
  
  <pre><code>Could not find a declaration file for module 'vue-slider-component'. 
  '/home/wahid/Development/tealvalley-app/node_modules/vue-slider- 
  component/dist/index.js' implicitly has an 'any' type.
  </code></pre>
  
  <p>What is the correct way to resolve these kind of issues? The types are not defined in the @types package, so if I were to define them myself, where do I keep it?</p>