From aab95acbeecee9e3d13f721d65a1002f8964b36e Mon Sep 17 00:00:00 2001
From: Nicola Soranzo <nicola.soranzo@earlham.ac.uk>
Date: Fri, 4 Sep 2026 18:32:55 +0100
Subject: [PATCH] Update CircleCI pipeline to version 2.1

On 2026-09-21 CircleCI is removing support for `version: 2.0` configs:

https://circleci.com/changelog/upcoming-config-compilation-breaking-changes/
---
 .circleci/config.yml | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 02cead37092..d082bd44a34 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,5 +1,4 @@
-# Python CircleCI 2.0 configuration file
-version: 2
+version: 2.1
 variables:
   restore_repo_cache: &restore_repo_cache
     restore_cache:
@@ -82,7 +81,6 @@ jobs:
       - *install_tox
       - run: tox -e validate_test_tools
 workflows:
-  version: 2
   get_code_and_test:
     jobs:
       - get_code