Remove python 3.5 support

because it does not working with pyyaml >= 6.
Additionally, python 3.5 is deprecated

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.5", "3.6", "3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
 
     steps:
       - uses: actions/checkout@v3

setup.py

@@ -16,7 +16,7 @@ def readme():
     author='Moritz Rumpf',
     author_email='moritz.rumpf@gmail.com',
     license='MIT',
-    python_requires='>=3.5.0',
+    python_requires='>=3.6.0',
     entry_points={
         'console_scripts': ['fints2ledger=fints2ledger.main:main'],
     },
@@ -26,8 +26,10 @@ def readme():
     zip_safe=False,
     classifiers=[
         'Development Status :: 3 - Alpha',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
     ],
 )