title: Argument of type 'string' is not assignable to parameter of type 'never'
body: <p>I'm getting a typescript error with version 2.0.3 on line 6. </p>
  
  <pre><code> private getFormEncode(formValues: any): string {
      let str: Array&lt;any&gt; = [];
      for (let key of Object.keys(formValues)) {
        const name: string = encodeURIComponent(key);
        const value: string =  encodeURIComponent(formValues[key]);
        str.push(`${name}=${value}`);
      }
      return str.join('&amp;');
   }
  </code></pre>