gguf-py : add tqdm as a dependency

It's small, and used for a progress bar
in GGUFWriter.write_tensors_to_file

gguf-py/pyproject.toml

@@ -21,6 +21,7 @@ classifiers = [
 [tool.poetry.dependencies]
 python = ">=3.8"
 numpy = ">=1.17"
+tqdm = ">=4.27"
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.2"