Reduce supported Python versions

Author: cgillum

.github/workflows/pr-validation.yml

@@ -1,7 +1,7 @@
 # This workflow will install Python dependencies, run tests and lint with a variety of Python versions
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
 
-name: Python package
+name: PR Validation
 
 on:
   push:
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v3

README.md

@@ -12,7 +12,7 @@ This repo contains a Python client SDK for use with the [Durable Task Framework
 
 ### Prerequisites
 
-- Python 3.8 or higher
+- Python 3.10 or higher
 
 ### Installing
 
@@ -32,13 +32,24 @@ If the gRPC proto definitions need to be updated, the corresponding source code
 python3 -m grpc_tools.protoc --proto_path=./submodules/durabletask-protobuf/protos  --python_out=./durabletask/protos --pyi_out=./durabletask/protos --grpc_python_out=./durabletask/protos orchestrator_service.proto
 ```
 
+### Linting and running unit tests
+
+See the [pr-validation.yml](.github/workflows/pr-validation.yml) workflow for the full list of commands that are run as part of the CI/CD pipeline.
+
 ### Running E2E tests
+
 The E2E (end-to-end) tests require a sidecar process to be running. You can run a sidecar process using the following `docker` command (assumes you have Docker installed on your local system.)
 
 ```sh
 docker run --name durabletask-sidecar -p 4001:4001 --env 'DURABLETASK_SIDECAR_LOGLEVEL=Debug' --rm cgillum/durabletask-sidecar:latest start --backend Emulator
 ```
 
+To run the E2E tests, run the following command from the project root (we assume you have `pytest` installed locally):
+
+```sh
+pytest -m e2e --verbose
+```
+
 ## Contributing
 
 This project welcomes contributions and suggestions.  Most contributions require you to agree to a