[Feature] Allow custom ticks on YAxis

[nickyli98]

Right now we can't define our own tick values as that is defined for us using d3-array. The ticks props is not passed through to YAxis component, if we want a finer grain control (In my case showing axis tick values on the turning points of the line-chart), it is not possible. A simple change of checking whether the ticks props is passed would allow for this.