title: Shell: Map all keys in a string format (json compatible)
body: <p>I have an object in a file like:</p>
  <h2>foo.txt</h2>
  <pre><code>{
  &quot;methods&quot; :
        {
          0 : &quot;GET&quot;,
        },
  }
  </code></pre>
  <p>I would like to convert to json with <code>jq</code> or some other shell converter. Specifically I want to turn each key into a string <code>0</code> -&gt; <code>&quot;0&quot;</code>. Keys can be numerical or alphanumerical.</p>
  <h2>Update</h2>
  <p>Any other tool is also acceptable. Anything that gets the job done. Preferably a shell tool.</p>