Use vendor when building (#201)

* Use vendor code for all go calls

* Add missing vendor dependencies

* Add travis_retry to yarn install

* Fix go test call

vendor/github.com/99designs/gqlgen/cmd/root.go

@@ -0,0 +1,44 @@
+package cmd
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+
+	"github.com/99designs/gqlgen/graphql"
+	"github.com/urfave/cli"
+
+	// Required since otherwise dep will prune away these unused packages before codegen has a chance to run
+	_ "github.com/99designs/gqlgen/handler"
+)
+
+func Execute() {
+	app := cli.NewApp()
+	app.Name = "gqlgen"
+	app.Usage = genCmd.Usage
+	app.Description = "This is a library for quickly creating strictly typed graphql servers in golang. See https://gqlgen.com/ for a getting started guide."
+	app.HideVersion = true
+	app.Flags = genCmd.Flags
+	app.Version = graphql.Version
+	app.Before = func(context *cli.Context) error {
+		if context.Bool("verbose") {
+			log.SetFlags(0)
+		} else {
+			log.SetOutput(ioutil.Discard)
+		}
+		return nil
+	}
+
+	app.Action = genCmd.Action
+	app.Commands = []cli.Command{
+		genCmd,
+		initCmd,
+		versionCmd,
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		fmt.Fprint(os.Stderr, err.Error())
+		os.Exit(1)
+	}
+}