Fix build and run tests on Python 3.13

Author: jameshilliard

.github/workflows/release.yml

@@ -78,6 +78,7 @@ jobs:
           - "cp310-*"
           - "cp311-*"
           - "cp312-*"
+          - "cp313-*"
         exclude:
           - os: ubuntu-latest
             cibw_arch: universal2

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
         os: [windows-latest, ubuntu-latest, macos-latest]
 
     env:

setup.py

@@ -15,7 +15,7 @@
 
 ROOT = pathlib.Path(__file__).parent
 
-CYTHON_DEPENDENCY = 'Cython(>=0.29.24,<0.30.0)'
+CYTHON_DEPENDENCY = 'Cython>=0.29.24'
 
 
 class httptools_build_ext(build_ext):