Snow and DEFAULT_END_RADIUS lead to a timeout

[gserrg]

On the snow (or other blocks from PrismarineJS/mineflayer#228), the bot goes 1 block higher, as a result, DEFAULT_END_RADIUS may be too small to reach the target. In this scenario, all findPathSync work until timeout.

p.s. In my case, I explicitly increase the radius, but in many algorithms this is not an obvious moment that affects the speed of navigation.