Update go.mod (#94)

go.mod

@@ -3,16 +3,5 @@ module github.com/rs/cors
 go 1.13
 
 require (
-	github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0 // indirect
-	github.com/codegangsta/negroni v1.0.0
 	github.com/gin-gonic/gin v1.5.0
-	github.com/go-martini/martini v0.0.0-20170121215854-22fa46961aab
-	github.com/gobuffalo/buffalo v0.15.3
-	github.com/gorilla/mux v1.7.3
-	github.com/julienschmidt/httprouter v1.3.0
-	github.com/justinas/alice v1.2.0
-	github.com/martini-contrib/render v0.0.0-20150707142108-ec18f8345a11
-	github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c // indirect
-	github.com/pressly/chi v4.0.2+incompatible
-	github.com/zenazn/goji v0.9.0
 )