Update SHA to latest common (#2429)

Mitko-Kerezov · web-flow · commit 3b79b9451ae8 · 2017-01-16T17:00:59.000+02:00
diff --git a/lib/common b/lib/common
@@ -1 +1 @@
-Subproject commit d212adbc9fa4bdbdc2577ff4240d7f69eb9ea99f
+Subproject commit 1f20f0412039b3fb247a3c2ab204f61270301058
