diff --git a/vendor/github.com/mitchellh/go-homedir/LICENSE b/vendor/github.com/mitchellh/go-homedir/LICENSE
new file mode 100644
index 000000000..f9c841a51
--- /dev/null
+++ b/vendor/github.com/mitchellh/go-homedir/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Mitchell Hashimoto
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/vendor/github.com/mitchellh/go-homedir/README.md b/vendor/github.com/mitchellh/go-homedir/README.md
new file mode 100644
index 000000000..d70706d5b
--- /dev/null
+++ b/vendor/github.com/mitchellh/go-homedir/README.md
@@ -0,0 +1,14 @@
+# go-homedir
+
+This is a Go library for detecting the user's home directory without
+the use of cgo, so the library can be used in cross-compilation environments.
+
+Usage is incredibly simple, just call `homedir.Dir()` to get the home directory
+for a user, and `homedir.Expand()` to expand the `~` in a path to the home
+directory.
+
+**Why not just use `os/user`?** The built-in `os/user` package requires
+cgo on Darwin systems. This means that any Go code that uses that package
+cannot cross compile. But 99% of the time the use for `os/user` is just to
+retrieve the home directory, which we can do for the current user without
+cgo. This library does that, enabling cross-compilation.
diff --git a/vendor/github.com/mitchellh/go-homedir/homedir.go b/vendor/github.com/mitchellh/go-homedir/homedir.go
new file mode 100644
index 000000000..6944957d5
--- /dev/null
+++ b/vendor/github.com/mitchellh/go-homedir/homedir.go
@@ -0,0 +1,132 @@
+package homedir
+
+import (
+	"bytes"
+	"errors"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+)
+
+// DisableCache will disable caching of the home directory. Caching is enabled
+// by default.
+var DisableCache bool
+
+var homedirCache string
+var cacheLock sync.RWMutex
+
+// Dir returns the home directory for the executing user.
+//
+// This uses an OS-specific method for discovering the home directory.
+// An error is returned if a home directory cannot be detected.
+func Dir() (string, error) {
+	if !DisableCache {
+		cacheLock.RLock()
+		cached := homedirCache
+		cacheLock.RUnlock()
+		if cached != "" {
+			return cached, nil
+		}
+	}
+
+	cacheLock.Lock()
+	defer cacheLock.Unlock()
+
+	var result string
+	var err error
+	if runtime.GOOS == "windows" {
+		result, err = dirWindows()
+	} else {
+		// Unix-like system, so just assume Unix
+		result, err = dirUnix()
+	}
+
+	if err != nil {
+		return "", err
+	}
+	homedirCache = result
+	return result, nil
+}
+
+// Expand expands the path to include the home directory if the path
+// is prefixed with `~`. If it isn't prefixed with `~`, the path is
+// returned as-is.
+func Expand(path string) (string, error) {
+	if len(path) == 0 {
+		return path, nil
+	}
+
+	if path[0] != '~' {
+		return path, nil
+	}
+
+	if len(path) > 1 && path[1] != '/' && path[1] != '\\' {
+		return "", errors.New("cannot expand user-specific home dir")
+	}
+
+	dir, err := Dir()
+	if err != nil {
+		return "", err
+	}
+
+	return filepath.Join(dir, path[1:]), nil
+}
+
+func dirUnix() (string, error) {
+	// First prefer the HOME environmental variable
+	if home := os.Getenv("HOME"); home != "" {
+		return home, nil
+	}
+
+	// If that fails, try getent
+	var stdout bytes.Buffer
+	cmd := exec.Command("getent", "passwd", strconv.Itoa(os.Getuid()))
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		// If "getent" is missing, ignore it
+		if err != exec.ErrNotFound {
+			return "", err
+		}
+	} else {
+		if passwd := strings.TrimSpace(stdout.String()); passwd != "" {
+			// username:password:uid:gid:gecos:home:shell
+			passwdParts := strings.SplitN(passwd, ":", 7)
+			if len(passwdParts) > 5 {
+				return passwdParts[5], nil
+			}
+		}
+	}
+
+	// If all else fails, try the shell
+	stdout.Reset()
+	cmd = exec.Command("sh", "-c", "cd && pwd")
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		return "", err
+	}
+
+	result := strings.TrimSpace(stdout.String())
+	if result == "" {
+		return "", errors.New("blank output when reading home directory")
+	}
+
+	return result, nil
+}
+
+func dirWindows() (string, error) {
+	drive := os.Getenv("HOMEDRIVE")
+	path := os.Getenv("HOMEPATH")
+	home := drive + path
+	if drive == "" || path == "" {
+		home = os.Getenv("USERPROFILE")
+	}
+	if home == "" {
+		return "", errors.New("HOMEDRIVE, HOMEPATH, and USERPROFILE are blank")
+	}
+
+	return home, nil
+}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 85af9fb8f..17d9bde1f 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -1314,6 +1314,11 @@
 			"revision": "7b48fa161ea73ce54566b233d6fba8750b2faf47",
 			"revisionTime": "2018-04-02T23:40:41Z"
 		},
+		{
+			"checksumSHA1": "z235fRXw4+SW4xWgLTYc8SwkM2M=",
+			"path": "github.com/mitchellh/go-homedir",
+			"revision": "d682a8f0cf139663a984ff12528da460ca963de9"
+		},
 		{
 			"checksumSHA1": "SJOpcDnBxxKHq146atZmumzST3A=",
 			"path": "github.com/mitchellh/go-vnc",
@@ -1482,18 +1487,18 @@
 			"revision": "2d205ac6ec17a839a94bdbfd16d2fa6c6dada2e0",
 			"revisionTime": "2016-03-31T20:48:55Z"
 		},
-		{
-			"checksumSHA1": "4gVuzkHbQoznf+lCSJhIJnvS5tc=",
-			"path": "github.com/rwtodd/Go.Sed/sed",
-			"revision": "d6d5d585814e4c3560c684f52e3d8aeed721313d",
-			"revisionTime": "2017-05-07T04:53:31Z"
-		},
 		{
 			"checksumSHA1": "6JP37UqrI0H80Gpk0Y2P+KXgn5M=",
 			"path": "github.com/ryanuber/go-glob",
 			"revision": "256dc444b735e061061cf46c809487313d5b0065",
 			"revisionTime": "2017-01-28T01:21:29Z"
 		},
+		{
+			"checksumSHA1": "4gVuzkHbQoznf+lCSJhIJnvS5tc=",
+			"path": "github.com/rwtodd/Go.Sed/sed",
+			"revision": "d6d5d585814e4c3560c684f52e3d8aeed721313d",
+			"revisionTime": "2017-05-07T04:53:31Z"
+		},
 		{
 			"checksumSHA1": "zmC8/3V4ls53DJlNTKDZwPSC/dA=",
 			"path": "github.com/satori/go.uuid",