Update eslint-plugin-jsx-a11y to the latest version 🚀#24

greenkeeper[bot] wants to merge 1 commit intomasterpenx/govuk-react-example:masterfrom

greenkeeper/eslint-plugin-jsx-a11y-6.1.0penx/govuk-react-example:greenkeeper/eslint-plugin-jsx-a11y-6.1.0Copy head branch name to clipboard