Naiively Fix #285

[sisby-folk]

I've just added an updateNeighborsAt call after every setBlockAndUpdate call for retainOriginalBlocks, which seems to stop the grey grass issue.

I'll continue testing this on a custom build, but I figured you might have insight for any potential issues with this solution.

[sisby-folk]

So I'm now totally unsure if this fixes the problem. There seems to be some kind of issue that might specifically relate to fabric seasons snow? I'm still getting tonnes of gray grass - even in freshly generated worlds. And sometimes I'm even getting dirt, which is even weirder.

Without fabric seasons it appears to work as expected

Pre 2.0, fabric seasons uses a custom kind of snow, in 2.0, it seems to use vanilla snow - causing this: lucaargolo/fabric-seasons#118 which seems related. I've seen this issue on the pre-2.0 version. The 2.0 version doesn't have it - so I'd assume it relates to the non-vanilla snow blocks.

I'll leave this up for reference, but it seems like it's on seasons to fix 2.0 enough to be usable. Not... immensely clear on whether this fix is needed without seasons, now.

[sisby-folk]

Cool yeah this is total junk - works fine on 5.1.1, it's specifically a seasons pre-2.0 incompat - closed!