enable go modules for appveyor

aperezg · aperezg · commit 9caaf49273b4 · 2019-09-22T00:21:28.000+02:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -5,6 +5,7 @@ shallow_clone: true # for startup speed
 
 environment:
   GOPATH: C:\gopath
+  GO111MODULE: on
 
 stack: go 1.13
 
