Use babelify instead of grunt-react

Gruntfile.js

@@ -1,5 +1,6 @@
 var _ = require('underscore');
 var fs = require('fs');
+var babelify = require('babelify');
 
 // Haha, this is so tricky. so we have a template for index.html to stick
 // in the hashed JS and style files -- that template also contains
@@ -213,7 +214,9 @@ module.exports = function(grunt) {
     },
     browserify: {
       options: {
-        transform: [require('grunt-react').browserify]
+        transform: [babelify.configure({
+          presets: ['@babel/preset-env', '@babel/preset-react']
+        })]
       },
       dist: {
         files: {
@@ -234,7 +237,6 @@ module.exports = function(grunt) {
   grunt.loadNpmTasks('grunt-shell-spawn');
   grunt.loadNpmTasks('grunt-jasmine-node');
   grunt.loadNpmTasks('grunt-contrib-uglify-es');
-  grunt.loadNpmTasks('grunt-react');
   grunt.loadNpmTasks('grunt-env');
 
   grunt.registerTask('build',

package.json

@@ -13,6 +13,10 @@
     "url": "https://github.com/pcottle/learnGitBranching"
   },
   "devDependencies": {
+    "@babel/core": "^7.4.4",
+    "@babel/preset-env": "^7.4.4",
+    "@babel/preset-react": "^7.0.0",
+    "babelify": "^10.0.0",
     "browserify": "^13.0.0",
     "contributor-faces": "^1.0.2",
     "grunt": "^1.0.4",
@@ -24,7 +28,6 @@
     "grunt-hash": "~0.5.0",
     "grunt-jasmine-node": "~0.1.0",
     "grunt-jsxhint": "^0.5.0",
-    "grunt-react": "^0.12.1",
     "grunt-shell-spawn": "~0.3.0",
     "jasmine-node": "~1.12.0",
     "prompt": "^1.0.0"