refactor(starter): upgrade and move to typescript

src/components/Post/Author/__snapshots__/Author.test.tsx.snap

@@ -1,15 +1,10 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`Author renders correctly 1`] = `
-<div
-  className="author"
->
-  <p
-    className="author__bio"
-  >
+<div>
+  <p>
     Pellentesque odio nisi, euismod in, pharetra a, ultricies in, diam. Sed arcu.
     <a
-      className="author__bio-twitter"
       href="https://www.twitter.com/#"
       rel="noopener noreferrer"
       target="_blank"