Tests: Run tests with Node 4 and 0.12
Tests: Run tests with Node 4 and 0.12

bitjson/bitcore,martindale/bitcore,bitjson/bitcore,bitjson/bitcore,bitpay/bitcore-wallet-service,janko33bd/bitcore-wallet-service,troggy/bitcore-wallet-service,bitpay/bitcore-wallet-service,troggy/bitcore-wallet-service,bitjson/bitcore,martindale/bitcore,bitpay/bitcore,matiu/bitcore-wallet-service,janko33bd/bitcore-wallet-service,bitpay/bitcore,martindale/bitcore,martindale/bitcore,matiu/bitcore-wallet-service,bitpay/bitcore,bitpay/bitcore