fix: test failure, due to go 1.19 compatibility (#2256)

rest/router/patrouter_test.go

@@ -599,7 +599,7 @@ func TestParseWrappedRequest(t *testing.T) {
 }
 
 func TestParseWrappedGetRequestWithJsonHeader(t *testing.T) {
-	r, err := http.NewRequest(http.MethodGet, "http://hello.com/kevin/2017", nil)
+	r, err := http.NewRequest(http.MethodGet, "http://hello.com/kevin/2017", bytes.NewReader(nil))
 	assert.Nil(t, err)
 	r.Header.Set(httpx.ContentType, header.JsonContentType)
 
@@ -632,7 +632,7 @@ func TestParseWrappedGetRequestWithJsonHeader(t *testing.T) {
 }
 
 func TestParseWrappedHeadRequestWithJsonHeader(t *testing.T) {
-	r, err := http.NewRequest(http.MethodHead, "http://hello.com/kevin/2017", nil)
+	r, err := http.NewRequest(http.MethodHead, "http://hello.com/kevin/2017", bytes.NewReader(nil))
 	assert.Nil(t, err)
 	r.Header.Set(httpx.ContentType, header.JsonContentType)