Update appveyor.yml CI build number (doesn't really impact anything it being out of date)

amaitland · amaitland · commit b9f85747ec9d · 2017-03-13T09:52:52.000+10:00
Former-commit-id: 704d3ceda20be9b7b48a2cd264c3d1417c6843a1
diff --git a/appveyor.yml b/appveyor.yml
@@ -1,7 +1,7 @@
 environment:
   VisualStudioVersion: 12.0
 
-version: 53.0.0-CI{build}
+version: 57.0.0-CI{build}
   
 shallow_clone: true
 
