Update python versions to test - drop 3.6 and 3.7, add to 3.12

.github/workflows/python-package.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: [3.8, 3.9, 3.10, 3.11, 3.12]
 
     steps:
     - uses: actions/checkout@v2

README.md

@@ -1,7 +1,7 @@
 # filestorage
 A Python library to make storing files simple and easy.
 
-> :warning: Although there are extensive tests within this project for Python 3.6, 3.7, 3.8 and 3.9, it is a young project and there may be bugs and security holes. Be sure and test thoroughly prior to use in a production environment.
+> :warning: Although there are extensive tests within this project for Python versions 3.8 to 3.12, it is a young project and there may be bugs and security holes. Be sure and test thoroughly prior to use in a production environment.
 
 It is primarily intended to deal with file uploads to a static files directory or an object service like
 [AWS S3](https://aws.amazon.com/s3/?nc2=h_ql_prod_st_s3) or [Linode](https://www.linode.com/products/object-storage/).