Description
Tried to add Nitor as a heat source for the kettle via a CraftTweaker script (using the example script as provided on the wiki page), since support was apparently added for that, but I've found that it doesn't work. I then tried using vanilla blocks to test and it still doesn't work. I did also check the config had the feature enabled, and the cauldron's CT support does also work.

Oh, additional note, the example script provided on the wiki throws an error when used, seems like it's because this line:
Kettle.registerHeatSourceBlock(nitorItem as Block);
Should be written like this:
Kettle.registerHeatSourceBlock(nitorItem as IBlock);

Environment
The issue is present in Single-Player, probably Multi-Player
Other mods
The issue is present with just Forge, Witchery: Resurrected and Witchery: Companion

Steps to Reproduce
The more details are provided, the easier will be to reproduce and analyze the issue, thus more chances to solve it

1. Use a CraftTweaker script to try and add an additional heat source for the Kettle (like the example script on the wiki).
2. Load it up in an actual game.
3. Try it out and find that it doesn't work, when regular fire does work.