update go.mod

go.mod

@@ -9,10 +9,12 @@ require (
 	github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27
 	github.com/dennwc/btrfs v0.0.0-20190517175702-d917b30ff035
 	github.com/gin-gonic/gin v1.5.0
+	github.com/mattn/goveralls v0.0.5 // indirect
 	github.com/pkg/profile v1.4.0
 	github.com/ryszard/goskiplist v0.0.0-20150312221310-2dfbae5fcf46
 	github.com/smartystreets/goconvey v1.6.4
 	github.com/urfave/cli v1.22.3
 	golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527
+	golang.org/x/tools v0.0.0-20200312194400-c312e98713c2 // indirect
 	gopkg.in/op/go-logging.v1 v1.0.0-20160211212156-b2cb9fa56473
 )