Bump cython to >= 3

.github/workflows/build.yaml

@@ -26,7 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools "cython >= 0.28" pytest
+        pip install setuptools "cython >= 3" pytest
     - name: Build with Python ${{ matrix.python-version }}
       run: |
         python setup.py build

.github/workflows/publish-twine.yaml

@@ -44,7 +44,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools "cython >= 0.28"
+        pip install setuptools "cython >= 3"
     - name: Build sdist
       run: |
         python setup.py build