Attempt at Flow 0.53 support

Author: jseminck

lib/rules/prop-types.js

@@ -917,6 +917,12 @@ module.exports = {
         }
       },
 
+      TypeParameterInstantiation: function(node) {
+        if (node.params && node.params[0].type === 'GenericTypeAnnotation' && node.params[0].id.name === 'Props') {
+          markPropTypesAsDeclared(node, resolveTypeAnnotation(node));
+        }
+      },
+
       VariableDeclarator: function(node) {
         const destructuring = node.init && node.id && node.id.type === 'ObjectPattern';
         // let {props: {firstname}} = this

tests/lib/rules/prop-types.js

@@ -1558,6 +1558,20 @@ ruleTester.run('prop-types', rule, {
       ].join('\n'),
       parser: 'babel-eslint'
     },
+    {
+      code: `
+        type Props = {
+          foo: string,
+        };
+
+        class Bar extends React.Component<Props> {
+          render() {
+            return <div>{this.props.foo}</div>
+          }
+        }
+      `,
+      parser: 'babel-eslint'
+    },
     // issue #1288
     `function Foo() {
       const props = {}