title: Generate pydantic model from a dict
body: <p>Is there a straight-forward approach to generate a Pydantic model from a dictionary?</p>
  <p>Here is a sample of the data I have.</p>
  <pre><code>{
      'id': '424c015f-7170-4ac5-8f59-096b83fe5f5806082020',
      'contacts': [{
          'displayName': 'Norma Fisher',
          'id': '544aa395-0e63-4f9a-8cd4-767b3040146d'
      }],
      'startTime': '2020-06-08T09:38:00+00:00'
  }
  </code></pre>
  <p>Expecting a model similar to ...</p>
  <pre><code>class NewModel(BaseModel):
      id: str
      contacts: list
      startTime: str
  </code></pre>