"kardianos/osext" is obsolete on go-1.8+

[onlyjob]

The following patch allows to remove redundant github.com/kardianos/osext dependency:

--- a/appended.go
+++ b/appended.go
@@ -8,9 +8,8 @@
        "strings"
        "time"

        "github.com/daaku/go.zipexe"
-       "github.com/kardianos/osext"
 )

 // appendedBox defines an appended box
 type appendedBox struct {
@@ -30,9 +29,9 @@
 var appendedBoxes = make(map[string]*appendedBox)

 func init() {
        // find if exec is appended
-       thisFile, err := osext.Executable()
+       thisFile, err := os.Executable()
        if err != nil {
                return // not appended or cant find self executable
        }
        closer, rd, err := zipexe.OpenCloser(thisFile)

[GeertJohan]

Thanks, have merged the change.