* eslintrc: adapt changes in eslint-plugin-jsx-a11y
* Replace 'jsx-a11y/img-has-alt' with 'jsx-a11y/alt-text'.
Reference: evcohen/eslint-plugin-jsx-a11y@24b6193
* Replace 'jsx-a11y/onclick-has-focus' with 'jsx-a11y/interactive-supports-focus'
Reference: evcohen/eslint-plugin-jsx-a11y@cbdfeb8
* Replace 'jsx-a11y/onclick-has-role' with 'jsx-a11y/no-noninteractive-element-interactions'
Reference: evcohen/eslint-plugin-jsx-a11y@18c9b71
* Update eslint-plugin-jsx-a11y to 5.0.0
Follow the change in Code Climate. Make sure the same eslintrc
can be executed locally and in Code Climate.
* Convert .eslintrc.json to equivlant .eslintrc.yml
* Less quotes and commas, more readability, allow comment.
