CI: run on 13 and 14

Author: tinchodias

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
       # Default value means that a failure in one OS cancels all 
       fail-fast: false
       matrix:
-        smalltalk: [ Pharo64-12, Pharo64-13 ]
+        smalltalk: [ Pharo64-13, Pharo64-14 ]
         os: [ ubuntu-latest, macos-latest, windows-latest ]
         ston: [ .ci.ston ]
     runs-on: ${{ matrix.os }}