deprecation warnings in react package

[kremalicious]

Bunch of warnings when using eslint-config-ascribe-react:

The react/jsx-space-before-closing rule is deprecated. Please use the react/jsx-tag-spacing rule with the "beforeSelfClosing" option instead.
(node:48386) DeprecationWarning: [eslint] The 'ecmaFeatures' config file property is deprecated, and has no effect. (found in ./node_modules/eslint-config-airbnb/rules/react-a11y.js)
(node:48386) DeprecationWarning: [eslint] The 'ecmaFeatures' config file property is deprecated, and has no effect. (found in ./node_modules/eslint-config-airbnb/rules/react.js)