Update Gtk+3.0

[Rúben Rodrigues <ruben_gr live com pt>]

Hi guys,

I'm in trouble with gtk version i think. When i run pkg-config 
--modversion gtk+-3.0 in my Raspberry Pi that is running Raspbian OS, i 
get 3.14.5 version.

If i try to update with sudo apt-get update and sudo apt-get upgrade, i 
have the same version. How i can update to gtk+-3.20 version that is the 
lastest stable version?


Thanks guys.


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