Bump jsx-a11y version

Author: bondz

packages/eslint-config-react-app/README.md

@@ -17,7 +17,7 @@ If you want to use this ESLint configuration in a project not built with Create
 First, install this package, ESLint and the necessary plugins.
 
   ```sh
-  npm install --save-dev eslint-config-react-app babel-eslint@7.0.0 eslint@3.8.1 eslint-plugin-flowtype@2.21.0 eslint-plugin-import@2.0.1 eslint-plugin-jsx-a11y@2.2.3 eslint-plugin-react@6.4.1
+  npm install --save-dev eslint-config-react-app babel-eslint@7.1.1 eslint@3.15.0 eslint-plugin-flowtype@2.30.0 eslint-plugin-import@2.2.0 eslint-plugin-jsx-a11y@4.0.0 eslint-plugin-react@6.9.0
   ```
 
 Then create a file named `.eslintrc` with following contents in the root folder of your project:

packages/eslint-config-react-app/package.json

@@ -15,7 +15,7 @@
     "eslint": "^3.8.1",
     "eslint-plugin-flowtype": "^2.21.0",
     "eslint-plugin-import": "^2.0.1",
-    "eslint-plugin-jsx-a11y": "^2.2.3",
+    "eslint-plugin-jsx-a11y": "^4.0.0",
     "eslint-plugin-react": "^6.4.1"
   }
 }