fix: replace gopkg with github. (#1)

README.md

@@ -32,8 +32,7 @@ package main
 
 import (
 	"github.com/gin-contrib/static"
-
-	"gopkg.in/gin-gonic/gin.v1"
+	"github.com/gin-gonic/gin"
 )
 
 func main() {

example/bindata/example.go

@@ -6,8 +6,7 @@ import (
 
 	assetfs "github.com/elazarl/go-bindata-assetfs"
 	"github.com/gin-contrib/static"
-
-	"gopkg.in/gin-gonic/gin.v1"
+	"github.com/gin-gonic/gin"
 )
 
 type binaryFileSystem struct {

example/simple/example.go

@@ -2,8 +2,7 @@ package main
 
 import (
 	"github.com/gin-contrib/static"
-
-	"gopkg.in/gin-gonic/gin.v1"
+	"github.com/gin-gonic/gin"
 )
 
 func main() {

static.go

@@ -6,7 +6,7 @@ import (
 	"path"
 	"strings"
 
-	"gopkg.in/gin-gonic/gin.v1"
+	"github.com/gin-gonic/gin"
 )
 
 type ServeFileSystem interface {

static_test.go

@@ -8,8 +8,8 @@ import (
 	"path/filepath"
 	"testing"
 
+	"github.com/gin-gonic/gin"
 	"github.com/stretchr/testify/assert"
-	"gopkg.in/gin-gonic/gin.v1"
 )
 
 func performRequest(r http.Handler, method, path string) *httptest.ResponseRecorder {