fix: Use mvn:versions:update-child-modules (#49)

Author: Christopher-Chianelli

.github/scripts/change_versions.sh

@@ -11,13 +11,6 @@
 echo "     New version: $NEW_VERSION"
 echo "     New Python Version: $NEW_VERSION_PYTHON"
 mvn versions:update-parent "-DparentVersion=[$NEW_VERSION,$NEW_VERSION]" -DallowSnapshots=true -DgenerateBackupPoms=false
-(
-  cd jpyinterpreter ||
-  mvn versions:update-parent "-DparentVersion=[$NEW_VERSION,$NEW_VERSION]" -DallowSnapshots=true -DgenerateBackupPoms=false
-)
-(
-  cd timefold-solver-python-core ||
-  mvn versions:update-parent "-DparentVersion=[$NEW_VERSION,$NEW_VERSION]" -DallowSnapshots=true -DgenerateBackupPoms=false
-)
+mvn versions:update-child-modules
 sed -i "s/^timefold_solver_python_version.*=.*/timefold_solver_python_version = '$NEW_VERSION_PYTHON'/" setup.py
 git commit -am "build: switch to version $NEW_VERSION_PYTHON"