HiddenOre 1.5.4 for Spigot 1.13.1

I am proud to release a feature-rich update to Spigot 1.13.1 for HiddenOre. This introduces quite a few changes on top of what was introduced in the final 1.12.2 release. Lots of config format options -- be sure to review the example configs extensively!

From README:

v1.5.4 No changes, just 1.13.1 build

v1.5.3 Some general fixes and improvements to block-level exploit tracking.

v1.5.2 Adding in CivClassic style "veins", which are basically just distributions of ore backed by persistent noise fields instead of the classic HiddenOre probability distribution functions. The outcomes are probabilistically compatible, but the generation is quite a bit different. Check out config-veins.yml for a hopefully clear example. Note that due to fundamental implementation differences, configurations made for CivClassic veins are not portable to this implementation, as their implementation refactors the configs and introduces veins as a separate flow, with only some of the tradition drop or generation capabilities; our approach to veins preserves all the existing feature-rich environment and simply implements veins as a probability distribution modifier to existing drop configs (Expanding the features in 1.5.1 for global drop config design as well).

v1.5.1 Adding in a few key QoL features for continued 1.13 support. Specifically (and see config.yml for examples and details) you can now specify drops in a global section, and pick those drops by name in the block drop configurations. You can also specify multiple blocks for whom the drop config should apply, all in the same block config. This should allow significantly improved "terseness" to configs, above and beyond what the prior subtype system allowed. Note you can mix and match global drops and local drop configs for a block, but you cannot mix single or multiple block types for a single block config.

v1.5.0 Added Minecraft 1.13 support. Note that you WILL need to REDO your config. Although your config will load as is it is unlikely to work as expected. Subtype support has been entirely removed and declarations of subtypes will be ignored. Spigot itself has renamed many materials to match their Minecraft normative style, and there is no backwards compatibility in HiddenOre. As of 1.5.0, no prior release of Minecraft is guaranteed active support, and will only be provided on a best-effort basis, if at all. IMPORTANT NOTE on config: All ItemStack serialization has been changed! There is a new v: specification. I've emulated it in the demonstration configs, but to avoid messy and unsupported prior version settings, re-export your serialized drops.