Ensure bulk create returns plain objects when lean is 'true' (#186)

* Ensure bulk create returns plain objects when lean is 'true'

* Bump version number for feathers-service-tests

src/service.js

@@ -171,7 +171,15 @@ class Service {
     const discriminator = data[this.discriminatorKey] || this.discriminatorKey;
     const model = this.discriminators[discriminator] || this.Model;
     return model.create(data)
-      .then(result => (this.lean && result.toObject) ? result.toObject() : result)
+      .then(result => {
+        if (this.lean) {
+          if (Array.isArray(result)) {
+            return result.map(item => (item.toObject ? item.toObject() : item));
+          }
+          return result.toObject ? result.toObject() : result;
+        }
+        return result;
+      })
       .then(select(params, this.id))
       .catch(errorHandler);
   }

test/index.test.js

@@ -1,7 +1,7 @@
 /* eslint-disable no-unused-expressions */
 
 import { expect } from 'chai';
-import { base, example } from 'feathers-service-tests';
+import { base, example, orm } from 'feathers-service-tests';
 import errors from 'feathers-errors';
 import feathers from 'feathers';
 import service, { hooks, Service } from '../src';
@@ -334,6 +334,8 @@ describe('Feathers Mongoose Service', () => {
           done();
         });
     });
+
+    orm(leanPeople, errors, '_id');
   });
 
   describe('Lean Services', () => {