Changed `npm test` so it runs cross-platform ./node_modules ... failed on windows, but using `sh` to execute it should work cross-platform
Changed `npm test` so it runs cross-platform
./node_modules ... failed on windows, but using `sh` to execute it should work cross-platform

bastienleonard/node-gcm,imjerrybao/node-gcm,mauron85/node-gcm,pablonazareno/node-gcm,kaija/node-gcm