⬆️ update packages to the latest versions

package.json

@@ -4,14 +4,14 @@
   "private": true,
   "homepage": "http://ahfarmer.github.io/calculator",
   "devDependencies": {
-    "gh-pages": "^0.11.0",
-    "react-scripts": "0.4.1"
+    "gh-pages": "^1.1.0",
+    "react-scripts": "^1.0.17"
   },
   "dependencies": {
-    "big.js": "^3.1.3",
+    "big.js": "^5.0.3",
     "github-fork-ribbon-css": "^0.2.1",
-    "react": "^15.3.1",
-    "react-dom": "^15.3.1"
+    "react": "^16.2.0",
+    "react-dom": "^16.2.0"
   },
   "scripts": {
     "start": "react-scripts start",

src/component/Button.js

@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import './Button.css';
 
 class Button extends React.Component {
@@ -29,9 +30,9 @@ class Button extends React.Component {
   }
 }
 Button.propTypes = {
-  name: React.PropTypes.string,
-  orange: React.PropTypes.bool,
-  wide: React.PropTypes.bool,
-  clickHandler: React.PropTypes.func,
+  name: PropTypes.string,
+  orange: PropTypes.bool,
+  wide: PropTypes.bool,
+  clickHandler: PropTypes.func,
 };
 export default Button;

src/component/ButtonPanel.js

@@ -1,5 +1,7 @@
 import Button from './Button';
 import React from 'react';
+import PropTypes from 'prop-types';
+
 import './ButtonPanel.css';
 
 class ButtonPanel extends React.Component {
@@ -44,6 +46,6 @@ class ButtonPanel extends React.Component {
   }
 }
 ButtonPanel.propTypes = {
-  clickHandler: React.PropTypes.func,
+  clickHandler: PropTypes.func,
 };
 export default ButtonPanel;

src/component/Display.js

@@ -1,4 +1,6 @@
 import React from 'react';
+import PropTypes from 'prop-types';
+
 import './Display.css';
 
 class Display extends React.Component {
@@ -13,6 +15,6 @@ class Display extends React.Component {
   }
 }
 Display.propTypes = {
-  value: React.PropTypes.string,
+  value: PropTypes.string,
 };
 export default Display;