Add scipy dependency and ruff settigs.

pyproject.toml

@@ -13,12 +13,20 @@ dependencies = [
     "cyvcf2",
     "numpy",
     "pandas",
+    "scipy",
     #"pysam"
 ]
 # computed from git tags by setuptools-scm
 dynamic = ["version"]
 [tool.setuptools_scm]
 #version_file = "libsnp/_version.py"
+[tool.ruff.lint.per-file-ignores]
+# Ignore `E401` in all `__init__.py` files
+"__init__.py" = ["F401"]
+"tests/test_libsnp.py" = ["E402"]
+[tool.ruff.format]
+quote-style = "double"
+indent-style = "space"
 [build-system]
 requires = [
     "setuptools",