Add explicit dependency on Sphinx

AA-Turner · AA-Turner · commit e2fbe5ccc890 · 2023-03-14T13:27:20.000Z
diff --git a/pyproject.toml b/pyproject.toml
@@ -34,6 +34,9 @@ classifiers = [
     "Topic :: Documentation",
     "Topic :: Documentation :: Sphinx",
 ]
+dependencies = [
+    "Sphinx>=1.8",
+]
 dynamic = ["version"]
 
 [[project.authors]]
