Revert react dependency to 15.2.0
Revert react dependency to 15.2.0

joseph-roque/uottawa-campus-guide,joseph-roque/uOttawaCampusGuide,joseph-roque/uottawa-campus-guide,joseph-roque/uOttawaCampusGuide,joseph-roque/uottawa-campus-guide,joseph-roque/uOttawaCampusGuide