WIP: look for further errors

Author: nattylinden

.github/workflows/ci.yaml

@@ -3,13 +3,15 @@ name: CI
 on:
   pull_request:
   push:
-    branches: [main, signal/gh]
+    branches: [main, natty/github_actions/actions/download-artifact-4]
     tags: [v*.*.*]
 
 jobs:
   build:
     name: Test & Build
     strategy:
+      # Finish the other builds even if one fails.
+      fail-fast: false
       matrix:
         python-version: ['2.7', '3.7', '3.8', '3.10']
     runs-on: [ubuntu-20.04]