Run go mod tidy

Author: dhui

go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/google/go-cmp v0.2.0 // indirect
 	github.com/google/go-github v17.0.0+incompatible
 	github.com/google/go-querystring v0.0.0-20170111101155-53e6ce116135 // indirect
-	github.com/google/martian v2.0.0-beta.2+incompatible // indirect
+	github.com/google/martian v2.1.0+incompatible // indirect
 	github.com/gopherjs/gopherjs v0.0.0-20180825215210-0210a2f0f73c // indirect
 	github.com/gorilla/context v1.1.1 // indirect
 	github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af // indirect

go.sum

@@ -78,8 +78,8 @@ github.com/google/go-github v17.0.0+incompatible h1:N0LgJ1j65A7kfXrZnUDaYCs/Sf4r
 github.com/google/go-github v17.0.0+incompatible/go.mod h1:zLgOLi98H3fifZn+44m+umXrS52loVEgC2AApnigrVQ=
 github.com/google/go-querystring v0.0.0-20170111101155-53e6ce116135 h1:zLTLjkaOFEFIOxY5BWLFLwh+cL8vOBW4XJ2aqLE/Tf0=
 github.com/google/go-querystring v0.0.0-20170111101155-53e6ce116135/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
-github.com/google/martian v2.0.0-beta.2+incompatible h1:Sthb/mONxL84r1YMJdDVpZPXwr7GgjxdTYteMGB9tVE=
-github.com/google/martian v2.0.0-beta.2+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
+github.com/google/martian v2.1.0+incompatible h1:/CP5g8u/VJHijgedC/Legn3BAbAaWPgecwXBIDzw5no=
+github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
 github.com/googleapis/gax-go v2.0.0+incompatible h1:j0GKcs05QVmm7yesiZq2+9cxHkNK9YM6zKx4D2qucQU=
 github.com/googleapis/gax-go v2.0.0+incompatible/go.mod h1:SFVmujtThgffbyetf+mdk2eWhX2bMyUtNHzFKcPA9HY=
 github.com/gopherjs/gopherjs v0.0.0-20180825215210-0210a2f0f73c h1:16eHWuMGvCjSfgRJKqIzapE78onvvTbdi1rMkU00lZw=