title: `console.log` a mobx `@observable` whenever its value changes
body: <p>Is there any way that a <code>console.log</code> will automatically fire whenever a mobx <code>@observable</code> changes value?</p>
  
  <p>I would do it with mobx dev tools but it fires a huge amount of console logs so it's hard to pin point the property whose value I am tracking.</p>