title: Error while building Angular app with agm-spiderfier
body: <ol>
  <li><p>I a getting error while compiling my code with AGM Spidefier library
  \node_modules\agm-spiderfier\index.ts is missing from the TypeScript compilation. Please make sure it is in your tsconfig via the 'files' or 'include' property.</p>
  </li>
  <li><p>Below are my tsconfig.app.json and tsconfig.spec.json</p>
  </li>
  </ol>
  <p>tsconfig.app.json</p>
  <pre><code>      {
           &quot;extends&quot;: &quot;./tsconfig.base.json&quot;,
           &quot;compilerOptions&quot;: {
            &quot;outDir&quot;: &quot;./out-tsc/app&quot;,
             &quot;types&quot;: []
          },
        &quot;files&quot;: [
          &quot;src/main.ts&quot;,
          &quot;src/polyfills.ts&quot;
        ],
        &quot;include&quot;: [
          &quot;src/**/*.d.ts&quot;,
          &quot;../node_modules/agm-spiderfier/*.ts&quot;
        ]
      }
  </code></pre>
  <p>tsconfig.spec.json</p>
  <pre><code>    {
        &quot;extends&quot;: &quot;./tsconfig.base.json&quot;,
        &quot;compilerOptions&quot;: {
          &quot;outDir&quot;: &quot;./out-tsc/spec&quot;,
          &quot;types&quot;: [
            &quot;jasmine&quot;,
            &quot;googlemaps&quot;  
          ]
        },
        &quot;files&quot;: [
          &quot;src/test.ts&quot;,
          &quot;src/polyfills.ts&quot;,
          &quot;../node_modules/agm-spiderfier/index.ts&quot;,    
        ],
        &quot;include&quot;: [
          &quot;src/**/*.spec.ts&quot;,
          &quot;src/**/*.d.ts&quot;,
          &quot;../node_modules/agm-spiderfier/*.ts&quot;
        ]
      }
  </code></pre>