Thresholds with decimal values

Your library is very nice. Thank you for supporting the community.
I have an issue is that when I change the threshold value to decimal, it does not work as expected.

vm.thresholds = {
      '0': {color: 'green'},
      '8': {color: "orange"},
      '20.05': {color: 'yellow'},
      '30.05': {color: 'coral'},
      '80': {color: 'red'}
    }