restore dependency

Author: vunb

appveyor.yml

@@ -23,7 +23,7 @@ install:
   # install submodules
   - git submodule update --init
   # install modules
-  - npm install -g node-pre-gyp
+  - npm install -g node-gyp node-pre-gyp node-pre-gyp-github
   - npm install --build-from-source
   # Check if we're building the latest tag, if so
   # then we publish the binaries if tests pass.