Keep GitHub Actions up to date with GitHub's Dependabot (#1383)

* Keep GitHub Actions up to date with GitHub's Dependabot

Automates the process of creating pull requests like:
* #1147
* #1292

---

* [Keeping your actions up to date with Dependabot](https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot)
* [Configuration options for the dependabot.yml file - package-ecosystem](https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#package-ecosystem)

* celery-version: ['5.2.x', '5.3.x']

* celery-version: ['5.2.x', '5.3.x']

* celery-version: ['5.2.*', '5.3.*']

* Modern pip has a real dependency resolver

* Fix yield-in-for-loop

* requirements/dev.txt imports default and test

* Celery 5.2 does not support Python 3.12

* celery-version: ['5.2.*', '5.3.*', '5.4.*']

.github/dependabot.yml

@@ -0,0 +1,13 @@
+# Keep GitHub Actions up to date with GitHub's Dependabot...
+# https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot
+# https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#package-ecosystem
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    groups:
+      github-actions:
+        patterns:
+          - "*"  # Group all Actions updates into a single larger pull request
+    schedule:
+      interval: weekly

.github/workflows/build.yml

@@ -7,31 +7,33 @@ jobs:
     runs-on: ubuntu-latest
 
     strategy:
+      fail-fast: false
       matrix:
         python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
-        celery-version: ['5.2', '5.3']
+        celery-version: ['5.2.*', '5.3.*', '5.4.*']
         tornado-version: ['6.0']
+        exclude:  # https://docs.celeryq.dev/en/v5.2.7/whatsnew-5.2.html#step-5-upgrade-to-celery-5-2
+          - python-version: '3.12'
+            celery-version: '5.2.*'
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install celery==${{ matrix.celery-version }}
-        pip install tornado==${{ matrix.tornado-version }}
-        pip install -r requirements/default.txt
-        pip install -r requirements/test.txt
-        pip install -r requirements/dev.txt
+        pip install celery==${{ matrix.celery-version }} \
+                    tornado==${{ matrix.tornado-version }} \
+                    -r requirements/dev.txt
 
     - name: Lint with pylint
       run: |
-        pylint flower  --rcfile .pylintrc
+        pylint flower --rcfile .pylintrc
 
     - name: Run unit tests
       run: |

flower/utils/tasks.py

@@ -56,11 +56,10 @@ def sort_tasks(tasks, sort_by):
     if sort_by.startswith('-'):
         sort_by = sort_by.lstrip('-')
         reverse = True
-    for task in sorted(
+    yield from sorted(
             tasks,
             key=lambda x: getattr(x[1], sort_by) or sort_keys[sort_by](),
-            reverse=reverse):
-        yield task
+            reverse=reverse)
 
 
 def get_task_by_id(events, task_id):