Add python-3.13 to CI

Author: bbannier

.github/workflows/btest.yml

@@ -12,7 +12,12 @@ jobs:
   Run-BTest:
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version:
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
         os: [macos-latest, ubuntu-latest, windows-latest]
 
     runs-on: ${{ matrix.os }}
@@ -53,7 +58,12 @@ jobs:
   Test-SetupPY:
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version:
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
         os: [ubuntu-latest]
 
     runs-on: ${{ matrix.os }}