Only run on master.

Author: octalmage

appveyor.yml

@@ -9,6 +9,10 @@ environment:
     - nodejs_version: "6"
     - nodejs_version: "Stable"
 
+platform:
+  - x86
+  - x64
+
 # Install scripts. (runs after repo cloning)
 install:
   # Get the latest stable version of Node 0.STABLE.latest
@@ -28,7 +32,7 @@ test_script:
   - npm test
 
 on_success:
-  - npm run prebuild -- -u %GITHUB_TOKEN%
+  - IF "%APPVEYOR_PULL_REQUEST_NUMBER%"="" npm run prebuild -- -u %GITHUB_TOKEN%
 
 build: off
 version: "{build}"