update docs about min python req

Author: mustafasoylu

README.md

@@ -87,7 +87,7 @@ recommendations on the state of software citation in academic practice.
 
 ## Getting Started
 
-Make sure that you have a working Python interpreter in version at least 3.8,
+Make sure that you have a working Python interpreter in version at least 3.9,
 `git` and [`poetry`](https://python-poetry.org/docs/#installation) installed.
 
 To install the template, run `pip install fair-python-cookiecutter`.

src/fair_python_cookiecutter/template/{{ cookiecutter.project_slug }}/.github/ISSUE_TEMPLATE/bug_report.md

@@ -28,7 +28,7 @@ If applicable, provide a Python stack trace or JavaScript console log from the b
 **Environment**
 Provide information about versions of relevant software packages.
 
- - Python Version (e.g. 3.8.10)
+ - Python Version (e.g. 3.9.10)
  - poetry version (e.g. 1.2.1)
  - Browser [e.g. chrome, safari] + Version
 

src/fair_python_cookiecutter/template/{{ cookiecutter.project_slug }}/README.md

@@ -37,7 +37,7 @@ A copy of the guide is included in your project in `docs/dev_guide.md`.
 
 **TODO: check that the installation instructions work**
 
-This project works with Python > 3.8.
+This project works with Python > 3.9.
 
 ```bash
 pip install git+ssh://{{ cookiecutter.project_clone_url }}