chore(package): update eslint-plugin-jsx-a11y to version 6.2.3

Closes #10

Author: greenkeeper[bot]

package.json

@@ -56,7 +56,7 @@
     "eslint": "^4.2.0",
     "eslint-config-airbnb": "16.1.0",
     "eslint-plugin-import": "^2.7.0",
-    "eslint-plugin-jsx-a11y": "6.0.3",
+    "eslint-plugin-jsx-a11y": "6.2.3",
     "eslint-plugin-mocha": "^5.0.0",
     "eslint-plugin-react": "^7.3.0",
     "jest": "^23.0.0",