Revert "??? limit tests to OS:win/ubuntu & Python:3.13 & OM:stable"

This reverts commit eb312b41854b6310587e6be3cd1bed273e9197e0.

Author: syntron

.github/workflows/Test.yml

@@ -14,9 +14,9 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        python-version: ['3.13']
+        python-version: ['3.10', '3.12', '3.13']
         os: ['ubuntu-latest', 'windows-latest']
-        omc-version: ['stable']
+        omc-version: ['stable', 'nightly']
 
     steps:
       - uses: actions/checkout@v6