chore(mc): Upgrade webpack and babel-related depependencies
chore(mc): Upgrade webpack and babel-related depependencies

sarracini/activity-stream,Mardak/activity-stream,sarracini/activity-stream,rlr/activity-streams,AdamHillier/activity-stream,rlr/activity-streams,mozilla/activity-stream,AdamHillier/activity-stream,sarracini/activity-stream,AdamHillier/activity-stream,Mardak/activity-stream,mozilla/activity-stream,Mardak/activity-stream,mozilla/activity-stream,sarracini/activity-stream,mozilla/activity-streams,mozilla/activity-streams,mozilla/activity-stream,rlr/activity-streams,JaredKerim-Mozilla/activity-stream,JaredKerim-Mozilla/activity-stream,rlr/activity-streams,JaredKerim-Mozilla/activity-stream,JaredKerim-Mozilla/activity-stream,AdamHillier/activity-stream,Mardak/activity-stream