Fix `babel-messages` dependency

I don't know if the issue [0] was caused by a faulty merge, or why, but
it seems like babel-messages had the wrong URL in there and resolved to
babel-plugin-transform-object-rest-spread, which is wrong.

So the integrity check did actually work and catch that!

[0]: https://gitlab.com/gitlab-org/gitlab-ce/issues/52192

yarn.lock

@@ -1194,10 +1194,9 @@ babel-loader@^8.0.4:
 
 babel-messages@^6.23.0:
   version "6.23.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-object-rest-spread/-/babel-plugin-transform-object-rest-spread-6.23.0.tgz#875d6bc9be761c58a2ae3feee5dc4895d8c7f921"
+  resolved "https://registry.yarnpkg.com/babel-messages/-/babel-messages-6.23.0.tgz#f3cdf4703858035b2a2951c6ec5edf6c62f2630e"
   integrity sha1-8830cDhYA1sqKVHG7F7fbGLyYw4=
   dependencies:
-    babel-plugin-syntax-object-rest-spread "^6.8.0"
     babel-runtime "^6.22.0"
 
 babel-plugin-istanbul@^5.1.0:
@@ -1214,11 +1213,6 @@ babel-plugin-rewire@^1.2.0:
   resolved "https://registry.yarnpkg.com/babel-plugin-rewire/-/babel-plugin-rewire-1.2.0.tgz#822562d72ed2c84e47c0f95ee232c920853e9d89"
   integrity sha512-JBZxczHw3tScS+djy6JPLMjblchGhLI89ep15H3SyjujIzlxo5nr6Yjo7AXotdeVczeBmWs0tF8PgJWDdgzAkQ==
 
-babel-plugin-syntax-object-rest-spread@^6.8.0:
-  version "6.13.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz#fd6536f2bce13836ffa3a5458c4903a597bb3bf5"
-  integrity sha1-/WU28rzhODb/o6VFjEkDpZe7O/U=
-
 babel-polyfill@6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-polyfill/-/babel-polyfill-6.23.0.tgz#8364ca62df8eafb830499f699177466c3b03499d"