Prepare changelog for release

CHANGES.md

@@ -1,30 +1,21 @@
-## unreleased
-
-### Added
+## 0.3.5
 
 ### Changed
 
 - Treat packages with no build commands as if they can be built with dune (#355,
   @gridbugs)
 
-### Deprecated
-
 ### Fixed
 
 - Fix resolving refs of locally pinned repositories (#326, #332, @hannesm,
   @Leonidas-from-XIV)
 - Read the `compiler` flag from OPAM metadata thus classifying more packages
   correctly as base packages (#328, @Leonidas-from-XIV)
-
 - Fix bug where dev repo urls ending with a "/" would result in
   `opam monorepo pull` placing package source code directly inside the duniverse
   directory instead of in a subdirectory of the duniverse directory (#359,
   @gridbugs)
 
-### Removed
-
-### Security
-
 # 0.3.4
 
 ### Added