title: Unable to use Lighthouse Typescript Definitions
body: <p>Currently trying to use the available Lighthouse Typescript definitions in the npm package, however no matter what I try, the definitions are never available to me within Visual Studio Code.</p>
  
  <p>I've installed only the following packages</p>
  
  <ul>
  <li>lighthouse</li>
  <li>devtools-protocol</li>
  <li>typescript</li>
  </ul>
  
  <p>tsconfig.json</p>
  
  <pre><code>{
    "compilerOptions": {
      "target": "ES2017",
      "module": "commonjs",
      "strict": true,
      "esModuleInterop": true,
      "outDir": "./build",
      "rootDir": "src",
      "noImplicitAny": false    
    },
    "include": ["./node_modules/lighthouse/types/**/*.d.ts"]
  }
  </code></pre>
  
  <p>src/app.ts</p>
  
  <pre><code>interface Foobar {
      test: &lt;cursor is here&gt;
  }
  </code></pre>
  
  <p>When I type <code>Base</code>, nothing autocompletes, but I would expect the <code>BaseArtifacts</code> definition to be available, which is defined within <code>./node_modules/lighthouse/types/artifacts.d.ts</code></p>