Resolve flow errors in eslint JSX a11y (#2346)

* Upgraded eslint-plugin-jsx-a11y to 5.0.3 to take advantage of
  d70ac7d7975819e7a52b85465ec67a0d93eb962a

Author: iainbeeston

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

@@ -15,7 +15,7 @@
     "eslint": "^3.19.0",
     "eslint-plugin-flowtype": "^2.33.0",
     "eslint-plugin-import": "^2.2.0",
-    "eslint-plugin-jsx-a11y": "^5.0.1",
+    "eslint-plugin-jsx-a11y": "^5.0.3",
     "eslint-plugin-react": "^7.0.1"
   }
 }

packages/react-error-overlay/.flowconfig

@@ -1,5 +1,4 @@
 [ignore]
-<PROJECT_ROOT>/node_modules/eslint-plugin-jsx-a11y/.*
 
 [include]
 src/**/*.js

packages/react-error-overlay/package.json

@@ -47,7 +47,7 @@
     "eslint-config-react-app": "^1.0.3",
     "eslint-plugin-flowtype": "2.33.0",
     "eslint-plugin-import": "2.2.0",
-    "eslint-plugin-jsx-a11y": "5.0.1",
+    "eslint-plugin-jsx-a11y": "5.0.3",
     "eslint-plugin-react": "7.0.1",
     "flow-bin": "0.46.0",
     "jest": "20.0.1",

packages/react-scripts/package.json

@@ -37,7 +37,7 @@
     "eslint-loader": "1.7.1",
     "eslint-plugin-flowtype": "2.33.0",
     "eslint-plugin-import": "2.2.0",
-    "eslint-plugin-jsx-a11y": "5.0.1",
+    "eslint-plugin-jsx-a11y": "5.0.3",
     "eslint-plugin-react": "7.0.1",
     "extract-text-webpack-plugin": "2.1.0",
     "file-loader": "0.11.1",