Fix: Python Version Updates to CI/CD Workflows

.github/workflows/publish-to-dafni.yaml

@@ -36,7 +36,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v3
         with:
-          python-version: 3.10
+          python-version: '3.10'
 
       - name: Build the container
         run: |

.github/workflows/publish-to-pypi.yaml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v3
         with:
-          python-version: 3.10
+          python-version: '3.10'
       - name: Installing package
         run: |
           pip3 install .

README.md

@@ -25,7 +25,7 @@ system-under-test that is expected to cause a change to some output(s).
 ## Installation
 
 ### Requirements
-- Python 3.9, 3.10, 3.11 and 3.12
+- Python 3.10, 3.11 and 3.12
 
 - Microsoft Visual C++ 14.0+ (Windows only).
 
@@ -121,4 +121,4 @@ To find the other (optional) developer dependencies, please check `pyproject.tom
 
 The Causal Testing Framework is supported by the UK's Engineering and Physical Sciences Research Council (EPSRC),
 with the project name [CITCOM](https://gow.epsrc.ukri.org/NGBOViewGrant.aspx?GrantRef=EP/T030526/1) - "_Causal Inference for Testing of Computational Models_" 
-under the grant EP/T030526/1.
+under the grant EP/T030526/1.

pyproject.toml

@@ -11,7 +11,7 @@ name = "causal_testing_framework"
 authors = [{ name = "The CITCOM team" }]
 description = "A framework for causal testing using causal directed acyclic graphs."
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = { text = "MIT" }
 keywords = ["causal inference", "verification"]
 dependencies = [
@@ -63,7 +63,7 @@ find = { }
 [tool.black]
 # https://github.com/psf/black
 line-length = 120
-target-version = ["py39"]
+target-version = ["py310"]
 
 [tool.autopep8]
 max_line_length = 120