updated mongodb and mongoose npm versions for better mongodb support
updated mongodb and mongoose npm versions for better mongodb support

suprnurd/ciquidus,UdjinM6/Coin2.1-explorer,upgradeadvice/explorer,upgradeadvice/explorer,iquidus/explorer,rudy4682/explorer,xCoreDev/explorer,suprnurd/ciquidus,UdjinM6/C2Chain,Findblocks/Blockexplorer,Findblocks/Blockexplorer,suprnurd/ciquidus,rudy4682/blockexp.info,rudy4682/explorer,UdjinM6/C2Chain,UdjinM6/Coin2.1-explorer,rudy4682/blockexp.info,xCoreDev/explorer