dl: add go1.13.4 and go1.12.13

Change-Id: I80e2daaabcccccc30637bef8cea9b8fad524a015
Reviewed-on: https://go-review.googlesource.com/c/dl/+/204559
Reviewed-by: Alexander Rakoczy <alex@golang.org>
diff --git a/go1.12.13/main.go b/go1.12.13/main.go
new file mode 100644
index 0000000..d55d581
--- /dev/null
+++ b/go1.12.13/main.go
@@ -0,0 +1,24 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The go1.12.13 command runs the go command from Go 1.12.13.
+//
+// To install, run:
+//
+//     $ go get golang.org/dl/go1.12.13
+//     $ go1.12.13 download
+//
+// And then use the go1.12.13 command as if it were your normal go
+// command.
+//
+// See the release notes at https://golang.org/doc/devel/release.html#go1.12.minor
+//
+// File bugs at https://golang.org/issues/new
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.12.13")
+}
diff --git a/go1.13.4/main.go b/go1.13.4/main.go
new file mode 100644
index 0000000..bc86c2a
--- /dev/null
+++ b/go1.13.4/main.go
@@ -0,0 +1,24 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The go1.13.4 command runs the go command from Go 1.13.4.
+//
+// To install, run:
+//
+//     $ go get golang.org/dl/go1.13.4
+//     $ go1.13.4 download
+//
+// And then use the go1.13.4 command as if it were your normal go
+// command.
+//
+// See the release notes at https://golang.org/doc/devel/release.html#go1.13.minor
+//
+// File bugs at https://golang.org/issues/new
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.13.4")
+}