Big dependency update, all lowercase sirupsen's for all dependencies.

vendor/golang.org/x/net/http2/databuffer_test.go

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build go1.7
-
 package http2
 
 import (
@@ -71,13 +69,13 @@ func testDataBuffer(t *testing.T, wantBytes []byte, setup func(t *testing.T) *da
 func TestDataBufferAllocation(t *testing.T) {
 	writes := [][]byte{
 		bytes.Repeat([]byte("a"), 1*1024-1),
-		[]byte("a"),
+		[]byte{'a'},
 		bytes.Repeat([]byte("b"), 4*1024-1),
-		[]byte("b"),
+		[]byte{'b'},
 		bytes.Repeat([]byte("c"), 8*1024-1),
-		[]byte("c"),
+		[]byte{'c'},
 		bytes.Repeat([]byte("d"), 16*1024-1),
-		[]byte("d"),
+		[]byte{'d'},
 		bytes.Repeat([]byte("e"), 32*1024),
 	}
 	var wantRead bytes.Buffer