build: Use Visual Studio 2015 image

GilBenkoe · GilBenkoe · commit c0b25d03fb51 · 2021-05-21T16:56:35.000+02:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -2,6 +2,8 @@
 # http://www.appveyor.com/docs/build-configuration
 version: build{build}
 
+image: Visual Studio 2015
+
 platform:
   - Win64
 
