Bump appveyor version #.

bearoso · bearoso · commit 85e0a748e49b · 2018-12-16T11:04:59.000-06:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 1.57-{build}
+version: 1.58-{build}
 
 image: Visual Studio 2017
 
