need propsupdated hook

[ged-odoo]

Use case: some widget that needs to setup something in its mounted hook depending on props (for example, playground app tabbededitor widget with ace editor).

In that case, we want to update the ace editor value when props are changed. However, if we use the updateProps method as a hook, we need to remember to return a value, otherwise, we will get a cryptic error.

[ged-odoo]

fixed by 990a08d