feat(Dependencies): Bumped Mongoengine to version 0.27, replaced mongomock connection format

Author: abhinand-c

graphene_mongo/tests/models.py

@@ -1,10 +1,11 @@
 import mongoengine
 from datetime import datetime
+import mongomock
 from mongomock import gridfs
 
 gridfs.enable_gridfs_integration()
 mongoengine.connect(
-    "graphene-mongo-test", host="mongomock://localhost", alias="default"
+    "graphene-mongo-test", mongo_client_class=mongomock.MongoClient, alias="default"
 )
 
 

requirements.txt

@@ -6,7 +6,7 @@ future==0.18.2
 graphene==3.1.1
 promise==2.3
 mongoengine==0.19.1; python_version <= '3.5'
-mongoengine==0.24.2; python_version > '3.5'
+mongoengine==0.27; python_version > '3.5'
 mongomock==4.1.2
 pytest==4.6.11; python_version <= '3.5'
 pytest==7.1.3; python_version > '3.5'