Mark deprecated methods with UNSAFE_ prefix

src/components/info-button/info-button.jsx

@@ -21,7 +21,7 @@ class InfoButton extends React.Component {
             visible: false
         };
     }
-    componentWillMount () {
+    UNSAFE_componentWillMount () {
         window.addEventListener('mousedown', this.handleClick, false);
     }
     componentWillUnmount () {

src/components/modal/addtostudio/container.jsx

@@ -17,7 +17,7 @@ class AddToStudioModal extends React.Component {
         };
     }
 
-    componentWillUpdate () {
+    UNSAFE_componentWillUpdate () {
         this.closeIfFinishedUpdating();
     }
 

src/views/teacherwaitingroom/teacherwaitingroom.jsx

@@ -11,7 +11,7 @@ const render = require('../../lib/render.jsx');
 require('./teacherwaitingroom.scss');
 
 class TeacherWaitingRoom extends React.Component {
-    componentWillReceiveProps (nextProps) {
+    UNSAFE_componentWillReceiveProps (nextProps) {
         if (nextProps.approved) {
             window.location.href = '/educators/classes/';
         }