ruff: specify target-version

FFY00 · FFY00 · commit c1ee3f0c3dc9 · 2025-05-22T16:24:26.000+01:00
Signed-off-by: Filipe Laíns &lt;lains@riseup.net&gt;
diff --git a/pyproject.toml b/pyproject.toml
@@ -42,6 +42,7 @@ default-groups = ['test']
 
 [tool.ruff]
 line-length = 120
+target-version = 'py39'
 
 [tool.ruff.format]
 quote-style = 'single'
