title: Algolia query with integer or numeric value returns no results
body: <p>Hi I have a set of records that look something like this: </p>
  
  <pre><code>{
      id: 256,
      name: "Book",
      genre: "comedy",
      price: 25
  }
  </code></pre>
  
  <p>if my query:</p>
  
  <pre><code>const client = algoliasearch(app_id,secret)
  const index = client.initIndex('someindex')
  index.search({
      query: 256,
      page: 0,
      hitsPerPage: 100,
  }
  </code></pre>
  
  <p>is "Book" i get result, if my query is "comedy" I get results but if my query is 256 or 25 no results returned. Is there a parameter that I am misisng? Or how can I search for numerical value?</p>