Update Sparkle to 1.20.0

tiennou · tiennou · commit ec4e954d81e8 · 2018-11-19T23:08:40.000+01:00
diff --git a/External/Sparkle b/External/Sparkle
@@ -1 +1 @@
-Subproject commit 558cfd2153e7e096319d0081073ddc690f4d9aa3
+Subproject commit e1d4b19ce729a93b3deef99e5725ac0d43591ec2
