Revert "Temporarily stop building Node 7 on Windows" (#230)
Revert "Temporarily stop building Node 7 on Windows" (#230)

This reverts commit 75b08e90cff2064cd5f22d7947380a7a8c600d95.
DominicKramer/cloud-debug-nodejs,googleapis/cloud-debug-nodejs,ofrobots/cloud-debug-nodejs,ofrobots/cloud-debug-nodejs,matthewloring/cloud-debug-nodejs,ofrobots/cloud-debug-nodejs,matthewloring/cloud-debug-nodejs,matthewloring/cloud-debug-nodejs,DominicKramer/cloud-debug-nodejs,googleapis/cloud-debug-nodejs,googleapis/cloud-debug-nodejs,DominicKramer/cloud-debug-nodejs