v2.0.0

Added

• doRequest function for performing upsert, or just a query or a mutation
• Support for ACL features in Dgraph v1.1 - login & jwt refresh
• upsert and lang fields to proto message type SchemaNode
• Option for server-side sequencing

Changed

• Return type of Txn#mutate function from messages.Assigned to messages.Response
• Updated protobufs to the latest version
• Upgraded all typescript dev libraries to the latest version

Removed

• Support for null values where appropriate (because of typescript warning)