Merging upstream version 0.9.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

.github/workflows/doconfly.yml

@@ -2,7 +2,7 @@ name: doconfly
 on:
   push:
     branches:
-      - master
+      - main
     tags:
       - "*"
 

.github/workflows/tests.yml

@@ -8,15 +8,15 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.11']
+        python-version: ['3.12']
         include:
           - os: ubuntu-latest
-            python-version: '3.7'
+            python-version: '3.8'
           - os: ubuntu-latest
             python-version: 'pypy-3.8'
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install Ghostscript (Ubuntu)