Tests: Python 3.13 + Cron (#84)

* Python 3.13 + Cron

* Build on PR to build/

Author: jcrada

.github/workflows/test.yml

@@ -3,16 +3,18 @@ name: Test
 on:
   push:
     branches: [ main ]
-    # pull_request:
-    #   branches: [ main, feature/* ]
+  pull_request:
+    branches: [ build/* ]
+  schedule: # monthly, first day
+    - cron: 0 0 1 * *
 
 jobs:
   build:
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.10", "3.11", "3.12" ]
+        python-version: [ "3.10", "3.11", "3.12", "3.13" ]
 
     steps:
       - uses: actions/checkout@v4