.github/workflows/ci-sage.yml: Use updated requirements.txt instead o…

…f repeating package list

.github/workflows/ci-sage.yml

@@ -112,7 +112,7 @@ jobs:
         choco install make autoconf gcc-core gcc-g++ python3${{ matrix.python-version }}-devel --source cygwin
     - name: install dependencies
       run: |
-        C:\\tools\\cygwin\\bin\\bash -l -x -c 'export PATH=/usr/local/bin:/usr/bin && cd $(cygpath -u "$GITHUB_WORKSPACE") && python3.${{ matrix.python-version }} -m pip install -U --no-build-isolation setuptools wheel cysignals "Cython<3" Sphinx flake8'
+        C:\\tools\\cygwin\\bin\\bash -l -x -c 'export PATH=/usr/local/bin:/usr/bin && cd $(cygpath -u "$GITHUB_WORKSPACE") && python3.${{ matrix.python-version }} -m pip install -U --no-build-isolation -r requirements.txt'
     - name: install
       run: |
         C:\\tools\\cygwin\\bin\\bash -l -x -c 'export PATH=/usr/local/bin:/usr/bin && cd $(cygpath -u "$GITHUB_WORKSPACE") && python3.${{ matrix.python-version }} setup.py build_ext -i'
@@ -226,7 +226,7 @@ jobs:
     - name: Install dependencies
       run: |
           python -m pip install --upgrade pip
-          pip install -U --no-build-isolation setuptools wheel 'Cython<3' Sphinx flake8
+          pip install -U --no-build-isolation -r requirements.txt
     - name: Freeze pip
       run: |
           pip freeze
@@ -272,7 +272,7 @@ jobs:
     - name: Install dependencies
       run: |
           python -m pip install --upgrade pip
-          pip install -U --no-build-isolation setuptools wheel 'Cython<3' Sphinx flake8
+          pip install -U --no-build-isolation -r requirements.txt
     - name: Freeze pip
       run: |
           pip freeze

requirements.txt

@@ -1,3 +1,5 @@
 setuptools
-Cython>=0.28
-Sphinx>=1.6
+wheel
+Cython>=0.28, <3
+Sphinx
+flake8