Ladders x Melon farms

## Some information
Operating system: Windows 10
Java version: ?
Minecraft version: 1.12.2
Baritone version: Null Version (this is normal in a dev environment)
Forge mods (if used): salhack and impact

## How to reproduce
1. build a simple melon farm
2. put a ladder up to another level of the farm
3.make sure there is a melon beside / 1 block away from the ladder
enable autofarm on impact or type .b mine melon (or pumpkin)

Baritone should be in an endless cycle going halfway up the ladder, trying to mine the melon but sliding back down too soon.

Maybe you could either make it crouch or go the full way up

## Modified settings
To get the modified settings run `#modified` in game
allowbreak
allowparkour
allow place
colorcurrentpath

## Final checklist
- [ ] I know how to properly use check boxes
- [x] I have included the version of Minecraft I'm running, baritone's version and forge mods (if used).
- [x] I have included logs, exceptions and / or steps to reproduce the issue.
- [x] I have not used any OwO's or UwU's in this issue.

[Minecraft 1.12.2 2020-06-29 17-03-53.zip](https://github.com/cabaletta/baritone/files/4846643/Minecraft.1.12.2.2020-06-29.17-03-53.zip)