Add object styles inheritance.

[agustito37]

Feature Requests

Checklist

• My feature request is specific to @rootstrap/react-native-use-styles.

• I've searched open issues to make sure I'm not opening a duplicate feature request

Description

Add object styles inheritance. Something like this:

{
  style1: {
    fontSize: 12,
  },
  style2: {
    color: 'red',
  },
  style3: {
    extends: '.style1 .style2'
    textAlign: 'center',
  }
}