I recommend you to delete all the files located in plugins/Spicord/libs/* before updating, so Spicord will download the new ones, this will also save some disk space!
If you have the old config and you want to change the footer of the integrated addons, you will need to make your config look like this or just delete it and Spicord will extract the new one.
Project changes
Changed groupId to org.spicord
Improved (and fixed) Sponge compatibility
Fixed the library injection system
Fixed errors when creating an UniversalPlayer instance
Be able to register commands without an SpongePlugin instance
Improved the library loader
Now the data is buffered instead of writing byte-by-byte
Improved some javadoc
Added the reflect module
Deprecated eu.mcdb.spicord.Spicord, use org.spicord.Spicord instead
Deprecated Spicord#onLoad, use Spicord#addEventListener instead