update node 8.2.1

scripts/env/installNode.sh

@@ -2,4 +2,4 @@
 
 curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.1/install.sh | bash
 export NVM_DIR="$HOME/.nvm" && [ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"
-nvm install 7
+nvm install 8.2.1