Drop support for PostgreSQL 13

Django 5.2 needs 14 or higher

README.md

@@ -133,8 +133,7 @@ Answer the prompts with your own desired [options](http://cookiecutter-django.re
     2 - 16
     3 - 15
     4 - 14
-    5 - 13
-    Choose from 1, 2, 3, 4, 5 [1]: 1
+    Choose from 1, 2, 3, 4 [1]: 1
     Select cloud_provider:
     1 - AWS
     2 - GCP

cookiecutter.json

@@ -18,7 +18,7 @@
   "windows": "n",
   "editor": ["None", "PyCharm", "VS Code"],
   "use_docker": "n",
-  "postgresql_version": ["17", "16", "15", "14", "13"],
+  "postgresql_version": ["17", "16", "15", "14"],
   "cloud_provider": ["AWS", "GCP", "Azure", "None"],
   "mail_service": [
     "Mailgun",

docs/1-getting-started/project-generation-options.rst

@@ -70,7 +70,6 @@ postgresql_version:
     2. 16
     3. 15
     4. 14
-    5. 13
 
 cloud_provider:
     Select a cloud provider for static & media files. The choices are:

tests/test_cookiecutter_generation.py

@@ -63,7 +63,6 @@ SUPPORTED_COMBINATIONS = [
     {"postgresql_version": "16"},
     {"postgresql_version": "15"},
     {"postgresql_version": "14"},
-    {"postgresql_version": "13"},
     {"cloud_provider": "AWS", "use_whitenoise": "y"},
     {"cloud_provider": "AWS", "use_whitenoise": "n"},
     {"cloud_provider": "GCP", "use_whitenoise": "y"},