added support for certbot 3.0 and dropped support for python 3.8 closes

#145

requirements.txt

@@ -1,4 +1,4 @@
 setuptools>=41.6.0
 requests>=2.20.0,<3.0
-certbot>=1.18.0,<3.0
+certbot~=3.0
 dnspython>=2.0.0,<3.0

setup.py

@@ -1,13 +1,13 @@
 from setuptools import setup, find_packages
 
-import certbot_dns_duckdns
+from certbot_dns_duckdns import __version__
 
 with open("Readme.md") as f:
     long_description = f.read()
 
 setup(
     name="certbot_dns_duckdns",
-    version=certbot_dns_duckdns.__version__,
+    version=__version__,
     author="infinityofspace",
     url="https://github.com/infinityofspace/certbot_dns_duckdns",
     description="Obtain certificates using a DNS TXT record for DuckDNS domains",
@@ -17,7 +17,6 @@
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
@@ -29,9 +28,9 @@
         "Topic :: System :: Systems Administration"
     ],
     packages=find_packages(),
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     install_requires=[
-        "certbot>=1.18.0,<3.0",
+        "certbot~=3.0",
         "requests>=2.20.0,<3.0",
         "dnspython>=2.0.0,<3.0"
     ],

snap/snapcraft.yaml

@@ -3,7 +3,7 @@ summary: DuckDNS Authenticator plugin for Certbot
 description: DuckDNS Authenticator plugin for Certbot
 confinement: strict
 grade: stable
-base: core20
+base: core24
 adopt-info: certbot-dns-duckdns
 architectures:
   - build-on: amd64
@@ -15,8 +15,8 @@ parts:
     plugin: python
     source: .
     override-pull: |
-      snapcraftctl pull
-      snapcraftctl set-version `grep ^__version__ $SNAPCRAFT_PART_SRC/certbot_dns_duckdns/__init__.py | cut -f2 -d= | tr -d "\"[:space:]\""`
+      craftctl default
+      craftctl set version=\$(grep ^__version__ $SNAPCRAFT_PART_SRC/certbot_dns_duckdns/__init__.py | cut -f2 -d= | tr -d "\"[:space:]\"")
     build-environment:
       - SNAP_BUILD: "True"
     requirements:
@@ -34,15 +34,15 @@ parts:
     source: .
     stage: [ setup.py, certbot-shared ]
     override-pull: |
-      snapcraftctl pull
+      craftctl default
       mkdir -p $SNAPCRAFT_PART_SRC/certbot-shared
 
 slots:
   certbot:
     interface: content
     content: certbot-1
     read:
-      - $SNAP/lib/python3.8/site-packages
+      - $SNAP/lib/python3.12/site-packages
 
 plugs:
   certbot-metadata: