[GitHub] zeppelin issue #2707: [ZEPPELIN-3100] Upgrade node and npm version

[jongyoul]

Github user jongyoul commented on the issue:

    https://github.com/apache/zeppelin/pull/2707
  
    @felixcheung Yes, yarn is faster than npm4 but recently, npm5 is much 
faster than yarn. FE moves so fast :-)


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