Chore: Upgrade to react 15.5.4 (#2)

index.js

@@ -1,4 +1,5 @@
 var React = require('react');
+var PropTypes = require('prop-types');
 
 /**
  * React component to render collection of items separated by space or other separator.
@@ -35,13 +36,13 @@ function Group(props) {
 
 Group.propTypes = {
 	/** Items. */
-	children: React.PropTypes.node,
+	children: PropTypes.node,
 	/** Wrap in `<span>` instead of `<div>`. */
-	inline: React.PropTypes.bool,
+	inline: PropTypes.bool,
 	/** Custom separator (space by default). */
-	separator: React.PropTypes.node,
+	separator: PropTypes.node,
 	/** Custom class name. */
-	className: React.PropTypes.string,
+	className: PropTypes.string,
 };
 Group.defaultProps = {
 	separator: ' ',

package.json

@@ -23,15 +23,18 @@
     "enzyme": "^2.6.0",
     "gh-pages": "^0.11.0",
     "jest": "^17.0.2",
-    "react": "^15.4.0",
-    "react-addons-test-utils": "^15.4.0",
-    "react-dom": "^15.4.0",
+    "react": "^15.5.4",
+    "react-addons-test-utils": "^15.5.1",
+    "react-dom": "^15.5.4",
     "react-styleguidist": "^4.6.2",
+    "react-test-renderer": "^15.5.4",
     "semantic-release": "^6.3.2",
     "semantic-release-tamia": "^1.1.0",
     "webpack": "1.14.0"
   },
-  "dependencies": {},
+  "dependencies": {
+    "prop-types": "^15.5.8"
+  },
   "peerDependencies": {
     "react": ">=0.14.0"
   },