Added list queries for books and authors

Author: lakylekidd

schema/schema.js

@@ -87,6 +87,18 @@ const RootQuery = new GraphQLObjectType({
                 // For now return from dummy data
                 return _.find(authors, { id: args.id });
             }
+        },
+        books: {
+            type: new GraphQLList(BookType),
+            resolve(parent, args) {
+                return books;
+            }
+        },
+        authors: {
+            type: new GraphQLList(AuthorType),
+            resolve(parent, args) {
+                return authors;
+            }
         }
     }
 });