Correct mistake made in #281830

Author: BookOfGreg

package.json

@@ -14,6 +14,6 @@
     "webpack": "^2.3.3"
   },
   "dependencies": {
-    "react_ujs": "^2.6.1"
+    "react_ujs": "^2.6.0"
   }
 }

test/dummy_webpacker3/app/javascript/components/TodoListWithConsoleLog.js

@@ -6,7 +6,9 @@ module.exports = createReactClass({
     console.log('got initial state');
     return({mounted: "nope"});
   },
-  componentDidMount: function() {
+  componentWillMount: function() {
+    // This will need to be replaced
+    // https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html
     console.warn('mounted component');
     this.setState({mounted: 'yep'});
   },

test/dummy_webpacker3/app/javascript/components/WithSetTimeout.js

@@ -2,7 +2,7 @@ var React = require("react")
 var createReactClass = require("create-react-class")
 
 module.exports = createReactClass({
-  componentDidMount: function () {
+  componentWillMount: function () {
     setTimeout(function () {}, 1000)
     clearTimeout(0)
   },