Add sentencepiece dependency for the T5 tokenizer.

Author: RyanJDick

pyproject.toml

@@ -47,6 +47,8 @@ dependencies = [
   "opencv-python==4.9.0.80",
   "pytorch-lightning==2.1.3",
   "safetensors==0.4.3",
+  # sentencepiece is required to load T5TokenizerFast (used by FLUX).
+  "sentencepiece==0.2.0",
   "spandrel==0.3.4",
   "timm==0.6.13",               # needed to override timm latest in controlnet_aux, see  https://github.com/isl-org/ZoeDepth/issues/26
   "torch==2.2.2",