Allow installation of a more recent version of Map Macro (as dependency) to improve usability

[ilieandriuta]

At the moment, when installing Meetings Pro, also installs as dependency Map Macro 1.2.5. This version however, does not contain the Leaflet Map Library improvement as the last Map Macro 2.1 has, therefore the user must always have a Google API key to use it.
It would be nice (and useful) to have installed as dependency the last version of Map Macro, it would improve also the user experience.