modify appvayor config, only test master

wallisyan · JacksonTian · commit a2bd2d9947d6 · 2019-03-04T11:36:10.000+08:00
diff --git a/.appveyor.yml b/.appveyor.yml
@@ -1,4 +1,7 @@
 version: '1.0.{build}'
+branches:
+  only:
+    - master
 
 environment:
   matrix:
