fix: Stop exposing includes in getEntries response

Because links were already resolved, there's no point in keeping the includes property in the response.

Fixes #69

lib/entities/entry.js

@@ -45,6 +45,7 @@ export function wrapEntryCollection (data, resolveLinks) {
   if (resolveLinks) {
     const includes = prepareIncludes(wrappedData.includes, wrappedData.items)
     mixinLinkGetters(wrappedData.items, includes)
+    delete wrappedData.includes
   }
   return Object.freeze(wrappedData)
 }