update_mode default MODEL_CHANGED overrules update_on setting

[tmchartrand]

Since update_mode is listed is deprecated, I would expect to be able to specify update settings using only update_on. However, if I'm trying to specify a more selective set of update conditions in update_on, that list is extended by a set of update conditions from the default update_mode which I didn't specify:

streamlit-aggrid/st_aggrid/__init__.py

Line 302 in 1b31edc

update_on.extend(__parse_update_mode(update_mode))

Changing the default update_mode to NO_UPDATE and putting the full list in a default update_on would fix this.