Fix npm install for react-rss-reader
Fix npm install for react-rss-reader

Fix npm install command for react-rss-reader not finding packages event-stream@3.3.6 and flatmap-stream@0.1.0 . These 2 packages were removed from npm because they contained malware.

AJIXuMuK/sp-dev-fx-webparts,AJIXuMuK/sp-dev-fx-webparts,AJIXuMuK/sp-dev-fx-webparts,SharePoint/sp-dev-fx-webparts,SharePoint/sp-dev-fx-webparts