Drop 3.8 in CI and docs

Author: schloerke

.github/workflows/ci.yaml

@@ -21,7 +21,6 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"

CONTRIBUTING.md

@@ -8,7 +8,7 @@ The `posit-sdk` is a software development kit (SDK) for working with Posit's pro
 
 Before contributing to the `posit-sdk`, ensure that the following prerequisites are met:
 
-- Python >=3.8
+- Python >=3.9
 
 > [!INFO]
 > We require using virtual environments to maintain a clean and consistent development environment.

docs/installation.qmd

@@ -8,7 +8,7 @@ toc-depth: 2
 
 ## Python version
 
-We recommend using the latest version of Python available to you. The Posit SDK supports Python 3.8 and newer.
+We recommend using the latest version of Python available to you. The Posit SDK supports Python 3.9 and newer.
 
 ## Dependencies