Deploy only x64 releases

No need to waste github's storage.

Author: coldfix

.appveyor.yml

@@ -1,6 +1,6 @@
 platform:
-  - x86
   - x64
+  - x86
 
 environment:
   # For Python versions available on Appveyor, see
@@ -39,3 +39,4 @@ deploy:
   force_update: true
   on:
     APPVEYOR_REPO_TAG: true
+    PLATFORM: x64