test(types): add flow types to tests

Required some new finagling on <ResizableBox> but it worked well

Author: STRML

.flowconfig

@@ -10,6 +10,7 @@
 [include]
 
 [libs]
+flow-typed
 
 [lints]
 all=warn

__tests__/Resizable.test.js

@@ -1,3 +1,4 @@
+// @flow
 import React from 'react';
 import renderer from 'react-test-renderer';
 import {shallow} from 'enzyme';

__tests__/ResizableBox.test.js

@@ -1,3 +1,4 @@
+// @flow
 import React from 'react';
 import renderer from 'react-test-renderer';
 import {shallow} from 'enzyme';