Bump go.mongodb.org/mongo-driver from 1.0.1 to 1.5.1

Bumps [go.mongodb.org/mongo-driver](https://github.com/mongodb/mongo-go-driver) from 1.0.1 to 1.5.1.
- [Release notes](https://github.com/mongodb/mongo-go-driver/releases)
- [Commits](mongodb/mongo-go-driver@v1.0.1...v1.5.1)

---
updated-dependencies:
- dependency-name: go.mongodb.org/mongo-driver
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

go.mod

@@ -37,10 +37,8 @@ require (
 	github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726
 	github.com/siddontang/go-mysql v0.0.0-20190312052122-c6ab05a85eb8
 	github.com/sirupsen/logrus v1.6.0
-	github.com/stretchr/testify v1.5.1
-	github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c // indirect
-	github.com/xdg/stringprep v1.0.0 // indirect
-	go.mongodb.org/mongo-driver v1.0.1
+	github.com/stretchr/testify v1.6.1
+	go.mongodb.org/mongo-driver v1.5.1
 	golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e
 	google.golang.org/grpc v1.26.0
 	gopkg.in/DATA-DOG/go-sqlmock.v1 v1.3.0