[NeuroFedora] Updating arbor

[Antonio T. sagitter]

Hi all.

I have updated `arbor` to the release 0.3
If you agree, i will push this new package.

Rebuilds of Arbor on Copr:
https://copr.fedorainfracloud.org/coprs/sagitter/ForTesting/build/1428792/

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Antonio Trande
Fedora Project
mailto: sagitter(a)fedoraproject.org
GPG key: 0x7B30EE04E576AA84
GPG key server: https://keys.openpgp.org/