Upgrade react and fix warnings

packages/strapi-admin/admin/src/components/LeftMenuLinkContainer/index.js

@@ -20,15 +20,15 @@ function LeftMenuLinkContainer({ plugins }) {
     plugin.leftMenuSections.map((leftMenuSection, j) => {
 
       if (size(get(leftMenuSection, 'links')) === 0) {
-        return <div />;
+        return <div key="emptyDiv" />;
       }
 
       return (
         <div key={j}>
           <p className={styles.title}>{leftMenuSection.name}</p>
           <ul className={styles.list}>
-            {leftMenuSection.links.map((link, k) =>
-              <LeftMenuLink key={k} icon={link.icon || 'link'} label={link.label} destination={`/plugins/${plugin.id}/${link.destination}`} />
+            {leftMenuSection.links.map((link) => 
+              <LeftMenuLink key={link.label} icon={link.icon || 'link'} label={link.label} destination={`/plugins/${plugin.id}/${link.destination}`} />
             )}
           </ul>
         </div>

packages/strapi-helper-plugin/lib/src/components/Input/index.js

@@ -386,15 +386,9 @@ Input.propTypes = {
   label: PropTypes.string.isRequired,
   name: PropTypes.string.isRequired,
   noErrorsDescription: PropTypes.bool,
-  onBlur: PropTypes.oneOfType([
-    PropTypes.func,
-    PropTypes.bool,
-  ]),
+  onBlur: PropTypes.func,
   onChange: PropTypes.func.isRequired,
-  onFocus: PropTypes.oneOfType([
-    PropTypes.bool,
-    PropTypes.func,
-  ]),
+  onFocus: PropTypes.func,
   placeholder: PropTypes.string,
   selectOptions: PropTypes.array,
   selectOptionsFetchSucceeded: PropTypes.bool,
@@ -417,12 +411,12 @@ Input.defaultProps = {
   errors: [],
   inputDescription: '',
   noErrorsDescription: false,
-  onBlur: false,
-  onFocus: false,
+  onBlur: () => {},
+  onFocus: () => {},
   placeholder: '',
   selectOptions: [],
   selectOptionsFetchSucceeded: false,
   value: ''
-}
+};
 
 export default Input;

packages/strapi-helper-plugin/package.json

@@ -90,9 +90,9 @@
     "postcss-smart-import": "^0.7.5",
     "precss": "^2.0.0",
     "prettier": "^1.5.3",
-    "react": "^15.6.2",
+    "react": "^16.0.0-rc.3",
     "react-datetime": "^2.8.6",
-    "react-dom": "^15.6.2",
+    "react-dom": "^16.0.0-rc.3",
     "react-helmet": "^5.1.3",
     "react-intl": "^2.3.0",
     "react-redux": "^5.0.6",
@@ -115,4 +115,4 @@
     "webpack-hot-middleware": "^2.18.2",
     "whatwg-fetch": "^2.0.3"
   }
-}
+}