Make Vampirism compatible with newer and older Forge versions

[Cheaterpaul]

As reasoning #1231 (comment) and #1235

We have multiple choices here:

1. use Forge > 46.1.29
   • will work
   • forces the user to use newer forge versions
   • forces Vampirism to be removed / not added to modpacks
2. restrict Vampirism to Forge [46.1.0, 46.1.3]
   • will work
   • user will complain why Vampirism does not support newer version
   • limits the users freedom
3. try to do both
   • all forge version will be supported
   • the users can choose what to do
   • if someone complains / reports a bug we can always tell them to use Forge 46.1.3

While I do not like any of these choices I think the 3rd one is the best one given the circumstances.

This solution is based on Forge 46.1.0, keeps the old methods (we do not care about Forge [46.1.6-46.1.29)) and uses reflections to register the eye height event for newer versions

[maxanier]

I would always prefer to stick with recommended build. Anyone using most recent MinecraftForge can still use .beta.2.
Once the dust has settled we will migrate to NeoForge, so eventually this won't be an issue anymore.
I don't think we should actively support latest MinecraftForge

[maxanier]

We should restrict the Forge version range then and maybe manually change the CurseForge Displaytitle to make things clear