Disable react/prop-types eslint rule

We check Props using Flow types, and we have complete coverage of the
components using Flow. The eslint rule can't figure out every
combination of Flow types, especially around things like object spread
types. This commit disables the rule, to only rely on the Flow types,
and not have to worry about false negatives reported by the
react/prop-types rule.

.eslintrc.js

@@ -37,6 +37,9 @@ module.exports = {
     'react/no-redundant-should-component-update': 'error',
     'react/no-this-in-sfc': 'error',
     'react/no-typos': 'error',
+    // Flow provides enough coverage over the prop types, and there can be errors
+    // with some of the more complicated Flow types.
+    'react/prop-types': 'off',
     "react/jsx-curly-brace-presence": ['error', { "props": 'never', "children": 'never' }],
     // `no-unused-prop-types` is buggy when we use destructuring parameters in
     // functions as it misunderstands them as functional components.