Initializers are not allowed in ambient contexts error when installing Blueprint : <p>I'm trying to use the <code>@blueprintjs/core</code> library in my project. However, when I compile my code, I'm getting many errors like this:</p>

<pre><code>node_modules/@blueprintjs/core/dist/common/classes.d.ts(4,30):
  error TS1039: Initializers are not allowed in ambient contexts.
</code></pre>

<p>What's going on? What am I doing wrong?</p>
