support Python 3.14 (#453)

* support Python 3.14
* update Python in Docker containers

.github/workflows/ci.yml

@@ -24,11 +24,7 @@ jobs:
         # 3.x is used to run code coverage
         python-version: ["3.x", "3.14", "3.13", "3.12", "3.11", "3.10", "3.9"]
         platform: [ubuntu-latest, macos-latest, windows-latest, ubuntu-24.04-arm, macos-15-intel]
-        exclude:
-          - python-version: "3.14"
-            platform: windows-latest
-          - python-version: "3.x"
-            platform: windows-latest
+#        exclude:
 
     runs-on: ${{ matrix.platform }}
 
@@ -39,7 +35,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           check-latest: ${{ github.event_name == 'schedule' }}
-          allow-prereleases: true
+          allow-prereleases: false
       - name: Install zbar shared lib for QReader (Linux)
         if: runner.os == 'Linux'
         run: |