Update vendoring (#1304)

Update to current vendoring.

Signed-off-by: Ben Kochie <superq@gmail.com>

vendor/github.com/sirupsen/logrus/exported.go

@@ -1,6 +1,7 @@
 package logrus
 
 import (
+	"context"
 	"io"
 	"time"
 )
@@ -55,6 +56,11 @@ func WithError(err error) *Entry {
 	return std.WithField(ErrorKey, err)
 }
 
+// WithContext creates an entry from the standard logger and adds a context to it.
+func WithContext(ctx context.Context) *Entry {
+	return std.WithContext(ctx)
+}
+
 // WithField creates an entry from the standard logger and adds a field to
 // it. If you want multiple fields, use `WithFields`.
 //