chore: update go mod

go.mod

@@ -24,6 +24,7 @@ require (
 	github.com/leodido/go-urn v1.2.0 // indirect
 	github.com/lib/pq v1.4.0
 	github.com/opentracing/opentracing-go v1.1.0
+	github.com/pkg/errors v0.8.0
 	github.com/rs/xid v1.2.1
 	github.com/spf13/cobra v1.0.0
 	github.com/spf13/viper v1.6.3
@@ -35,6 +36,7 @@ require (
 	github.com/volatiletech/sqlboiler v3.7.0+incompatible
 	go.uber.org/zap v1.10.0
 	golang.org/x/text v0.3.2
+	golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543
 	google.golang.org/api v0.22.0
 	google.golang.org/grpc v1.29.1
 	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect