I was notified of the issue through email and here[0] is the text of the email i received.
Newer versions of debian and ubuntu do not accept sha1 using certificates[1] and it maybe that Antergos has patched their version of gpg to follow what these distributions are using.
I too should move away from sha1 because i think more and more people will start to be affected by this if i do not and i will do that with the next release of SiriKali.
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