Added handling of h4, h5 tags

Author: shadowy-pycoder

goso.go

@@ -63,6 +63,10 @@ var (
 		"</h2>", reset,
 		"<h3>", bold,
 		"</h3>", reset,
+		"<h4>", bold,
+		"</h4>", reset,
+		"<h5>", bold,
+		"</h5>", reset,
 		"<br>", "\n",
 		"<blockquote>", italic,
 		"</blockquote>", reset,