[ci] avoid Appveyor failures (#2753)

63c8c036 · Nikita Titov · GitHub · 3af7f006 · 63c8c036
Commit 63c8c036 authored Feb 08, 2020 by Nikita Titov Committed by GitHub Feb 08, 2020
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.appveyor.yml .appveyor.yml +1 -1

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--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -3,7 +3,7 @@
 image: Visual Studio 2015
 platform: x64
 configuration:  # a trick to construct a build matrix with multiple Python versions
-  - 3.6
+  - 3.7

 environment:
  matrix: