Bug#939093: add-node-component should use --download-current-version option of uscan

[Pirate Praveen]

Package: pkg-js-tools
Severity: important

Currently it download the latest version.
$ add-node-component -if streamfilter@1
Components added: streamfilter
add-node-component: Newest version of node-babel on remote site is 
7.5.5, local version is 7.4.5
add-node-component:    => Newer package available from
     <https://github.com/babel/babel/archive/v7.5.5.tar.gz>