.yardopts in google-cloud-storage-1.13.1 vs .yardopts in google-cloud-storage-1.14.0

@@ -1,8 +1,16 @@
 --no-private
 --title=Google Cloud Storage
 --markup markdown
 --markup-provider redcarpet
+--main OVERVIEW.md
 
 ./lib/**/*.rb
 -
-README.md
+OVERVIEW.md
+AUTHENTICATION.md
+LOGGING.md
+CONTRIBUTING.md
+TROUBLESHOOTING.md
+CHANGELOG.md
+CODE_OF_CONDUCT.md
+LICENSE