update pypi package to version 0.2.5
update pypi package to version 0.2.5

christianmemije/kolibri-exercise-perseus-plugin,christianmemije/kolibri-exercise-perseus-plugin,learningequality/kolibri-exercise-perseus-plugin,learningequality/kolibri-exercise-perseus-plugin,66eli77/kolibri-exercise-perseus-plugin,christianmemije/kolibri-exercise-perseus-plugin,66eli77/kolibri-exercise-perseus-plugin,66eli77/kolibri-exercise-perseus-plugin