Merge pull request alexcrichton#26 from calebcartwright/early-publish

update crate listing

Author: alexcrichton

README.md

@@ -1,5 +1,7 @@
 # rustc-auto-publish
 
-Repository for automatically publishing the `rustc-ap-rustc_ast` and
-`rustc-ap-rustc_parse` crates once a week.
+Repository for automatically publishing the below crates once a week.
 
+- `rustc-ap-rustc_ast`
+- `rustc-ap-rustc_expand`
+- `rustc-ap-rustc_parse`