Extract types from export default (#35)

* adds initial support for extracting types from defualt export and functional components

* adds best effort case for getting prop types for default export

* combines default props of functional components

* adds logic to prevent extracting things that look like function components inside class components

* removes unused function

* changes shape of what extract-react-types returns. Now returns a single component rather than an array of classes

* updates prettier to have 100 char line width

Author: petegleeson

.prettierrc

@@ -1,3 +1,4 @@
 {
-  "singleQuote": true
+  "singleQuote": true,
+  "printWidth": 100
 }