title: How to define INT type parameters in airflow templating?
body: <p>In my airflow task code, I'm able to declare and access string type parameters. However, when trying to assign INT type parameters, as follows,</p>
  
  <pre><code>task = Operator(
    task_id = 'task_name',
    parameters={"key1":"value1", "key2": 123}
  )
  </code></pre>
  
  <p>I'm getting the following error</p>
  
  <p><code>Type '&lt;type 'int'&gt;' used for parameter 'parameters[key2]' is not supported for templating</code>
  Are there ways to declare INT type parameters in airflow?</p>