[Snyk] Security upgrade npm from 2.15.12 to 6.6.0#40

isp1r0 wants to merge 1 commit intomasterisp1r0/bitcore-node:masterfrom

snyk-fix-e13b24086cf7eaff7eabcdebd145c3deisp1r0/bitcore-node:snyk-fix-e13b24086cf7eaff7eabcdebd145c3deCopy head branch name to clipboard