Update dependenciess

Exclude minio-go for now (pin to 3.x.y).

vendor/cloud.google.com/go/spanner/internal/testutil/mockclient.go

@@ -62,6 +62,9 @@ type MockCloudSpannerClient struct {
 	nice bool
 	// Client will stall on any requests.
 	freezed chan struct{}
+
+	// embed nil interface so updating proto with new methods don't fail the build
+	sppb.SpannerClient
 }
 
 // NewMockCloudSpannerClient creates new MockCloudSpannerClient instance.

vendor/cloud.google.com/go/spanner/internal/testutil/mockserver.go

@@ -73,6 +73,9 @@ type MockCloudSpanner struct {
 	msgs   chan MockCtlMsg
 	readTs time.Time
 	next   int
+
+	// embed nil interface so updating proto with new methods don't fail the build
+	sppb.SpannerServer
 }
 
 // Addr returns the listening address of mock server.