stricter Ruff rules, matching https://github.com/fjosw/pyerrors/pull/282

pyproject.toml

@@ -26,13 +26,17 @@ include = ["corrlib", "corrlib.*"]
 [tool.setuptools_scm]
 write_to = "corrlib/version.py"
 
+[tool.ruff]
+target-version = "py310"
+
 [tool.ruff.lint]
-ignore = ["E501"]
-extend-select = [
-  "YTT",
-  "E",
-  "W",
-  "F",
+extend-select = ["E", "W", "I", "B", "PIE", "PLE", "PLW", "UP", "NPY", "RUF"]
+ignore = [
+    "F403",     # star imports in __init__ files are intentional
+    "E501",     # line too long
+    "PLC0415",  # import outside top level
+    "PLW2901",  # redefined loop name (too noisy)
+    "RUF002",   # ambiguous unicode in docstrings (Greek letters)
 ]
 
 [tool.mypy]