Maintenance updates

Why these changes are being introduced:
* Implement minor maintenance updates as part of
Heroku software updates (Heroku stack and Redis).

How this addresses that need:
* Update Python version to 3.12
* Update Python dependencies
* Update README

Side effects of this change:
* None

Relevant ticket(s):
* https://mitlibraries.atlassian.net/browse/IN-1075

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Setup python
         uses: actions/setup-python@v2
         with:
-          python-version: '3.11'
+          python-version: '3.12'
           architecture: x64
       - name: Install
         run: |

Pipfile

@@ -4,7 +4,7 @@ verify_ssl = true
 name = "pypi"
 
 [requires]
-python_version = "3.11"
+python_version = "3.12"
 
 [dev-packages]
 black = "*"