Bug when one of breaks is exactly equal to zero

[aparshin]

In this line in the second condition you want to check that i+1 < length. But if one of breaks is exactly equal to zero, this check will fail (and lalse will be returned).

Maybe, just check i+1 < this.range.length?

[aparshin]

I've add a comment to your commit - could you check it, please...

[aparshin]

Test case:

var brew = new classyBrew();
brew.setSeries([10, 15, 20]);
brew.setNumClasses(3);
brew.setColorCode('BuGn');
brew.classify('equal_interval');

console.log(brew.getColorInRange(9)); //returns false - that's right
console.log(brew.getColorInRange(21)); //returns undefined - is this a bug? should return false too