Drop support for Python 3.8 and 3.9

As per latest testing runtime, we stopped testing the
python 3.8 and 3.9 so dropping their support.

Change-Id: I125e2614d354845746c3d95903796c7cc629d20d
Signed-off-by: Ivan Anfimov <lazekteam@gmail.com>

releasenotes/notes/drop-python-38-and-39.yaml

@@ -0,0 +1,4 @@
+---
+upgrade:
+  - |
+    Support for Python 3.8 and 3.9 has been dropped.

setup.cfg

@@ -4,8 +4,8 @@ description = Tool to translate non-heat templates to Heat Orchestration Templat
 long_description = file: README.rst
 author = OpenStack
 author_email = openstack-discuss@lists.openstack.org
-url = http://docs.openstack.org/heat-translator/
-python_requires = >=3.8
+url = https://docs.openstack.org/heat-translator/latest/
+python_requires = >=3.10
 classifiers =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -13,13 +13,13 @@ classifiers =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-    Programming Language :: Python :: 3
-
-    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
-    Programming Language :: Python :: 3.10
-    Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
 
 [files]
 packages =