and update readme to reflect that

README.md

@@ -13,6 +13,17 @@ It will:
 - run elm-package install and elm-make to make sure it worked
 - replace packages if they have been renamed (evancz/elm-html to elm-lang/html for example)
 
+## update_018_elm_package
+
+Automate upgrading to 0.18! Automate your elm-package and your file upgrades.
+
+It will:
+
+- tell you if any of your deps haven't been updated for 0.18 yet
+- update syntax using elm-format
+- update the packages to the 0.18 version
+- run elm-package install and elm-make to make sure it worked
+- replace packages if they have been renamed (evancz/elm-http to elm-lang/http for example)
 
 ```
 python update_elm_package.py ../upgrades/elm-lazy-list