fumaroles in the overworld don't create fire, but do extinguish fire if they're near some

[fluxionary]

a player was trying to use them to add a smoking effect to a bonfire build, but the fire kept going out. it took a while to understand what was going on.

the correct behavior should probably be either:

1. fumaroles work the same in both the nether and in the "overworld"
2. fumaroles neither create nor extinguish fire in the "overworld"

i prefer #2, but i thought i'd ask before submitting a PR.

[Treer]

I agree with your #2 as well, the fire was supposed to be a nether effect so extinguishing fire in the overworld is a bug,

FWIW, my thoughts behind the behaviour difference was:

• Having a block that's repurposable for e.g. cottage chimneys (or bonfires?) with puffs of smoke provides another 'treasure' to go on an expedition for.
• The nether needed more danger. Someone in issue 4 said "the only danger is falling down the cliff" and they had a point, so... surprise fire. Unlikely to catch anyone but perhaps it can add some atmosphere when seen in the distance, and reduce any feeling of safety when it happens a little too close.