Update dependencies

vendor/github.com/go-ping/ping/logger.go

@@ -0,0 +1,53 @@
+package ping
+
+import "log"
+
+type Logger interface {
+	Fatalf(format string, v ...interface{})
+	Errorf(format string, v ...interface{})
+	Warnf(format string, v ...interface{})
+	Infof(format string, v ...interface{})
+	Debugf(format string, v ...interface{})
+}
+
+type StdLogger struct {
+	Logger *log.Logger
+}
+
+func (l StdLogger) Fatalf(format string, v ...interface{}) {
+	l.Logger.Printf("FATAL: "+format, v...)
+}
+
+func (l StdLogger) Errorf(format string, v ...interface{}) {
+	l.Logger.Printf("ERROR: "+format, v...)
+}
+
+func (l StdLogger) Warnf(format string, v ...interface{}) {
+	l.Logger.Printf("WARN: "+format, v...)
+}
+
+func (l StdLogger) Infof(format string, v ...interface{}) {
+	l.Logger.Printf("INFO: "+format, v...)
+}
+
+func (l StdLogger) Debugf(format string, v ...interface{}) {
+	l.Logger.Printf("DEBUG: "+format, v...)
+}
+
+type NoopLogger struct {
+}
+
+func (l NoopLogger) Fatalf(format string, v ...interface{}) {
+}
+
+func (l NoopLogger) Errorf(format string, v ...interface{}) {
+}
+
+func (l NoopLogger) Warnf(format string, v ...interface{}) {
+}
+
+func (l NoopLogger) Infof(format string, v ...interface{}) {
+}
+
+func (l NoopLogger) Debugf(format string, v ...interface{}) {
+}