Default value returns NaN for numeric, single-property component schemas in A-Frame 0.7.* and 0.8.0.

I noticed that single-property components may be deprecated in future releases according to #2536, however they don't currently function as documented: https://aframe.io/docs/0.8.0/core/component.html#single-property-schema

• A-Frame Version: 0.7.* and 0.8.0
• Platform / Device: Bug reproduced on all devices tested: Firefox, Chrome, Edge, Samsung Internet on Windows and Android.
• Reproducible Code Snippet or URL:

AFRAME.registerComponent( 'test-component', {

  // Bug exists for types 'number' and 'int', possibly others.
  schema: { type: 'number', default: 10 },

  init: function() {
    // Returns NaN
    console.log( this.data ); 
  }

});

Demo: https://codepen.io/dansinni/pen/vRYJQy