Restrict Cython version to not include 3.1.1

Author: tobiasdiez

.devcontainer/onCreate-meson.sh

@@ -21,7 +21,7 @@ uv pip install \
     meson-python \
     "cypari2 >=2.2.1" \
     "cysignals >=1.11.2, != 1.12.0" \
-    "cython >=3.0, != 3.0.3, != 3.1.0" \
+    "cython >=3.0, != 3.0.3, < 3.1.0" \
     "gmpy2 ~=2.1.b999" \
     memory_allocator \
     "numpy >=1.25" \

.github/workflows/ci.yml

@@ -76,7 +76,7 @@ jobs:
             meson-python \
             "cypari2 >=2.2.1" \
             "cysignals >=1.11.2, != 1.12.0" \
-            "cython >=3.0, != 3.0.3, != 3.1.0" \
+            "cython >=3.0, != 3.0.3, < 3.1.0" \
             "gmpy2 ~=2.1.b999" \
             memory_allocator \
             "numpy >=1.25" \