Update c/image from the main branch

> go get github.com/containers/image/v5@main
> make vendor

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

vendor/github.com/go-openapi/strfmt/time.go

@@ -29,6 +29,12 @@ import (
 	"go.mongodb.org/mongo-driver/bson/bsontype"
 )
 
+var (
+	// UnixZero sets the zero unix timestamp we want to compare against.
+	// Unix 0 for an EST timezone is not equivalent to a UTC timezone.
+	UnixZero = time.Unix(0, 0).UTC()
+)
+
 func init() {
 	dt := DateTime{}
 	Default.Add("datetime", &dt, IsDateTime)
@@ -86,6 +92,9 @@ var (
 	// NormalizeTimeForMarshal provides a normalization function on time befeore marshalling (e.g. time.UTC).
 	// By default, the time value is not changed.
 	NormalizeTimeForMarshal = func(t time.Time) time.Time { return t }
+
+	// DefaultTimeLocation provides a location for a time when the time zone is not encoded in the string (ex: ISO8601 Local variants).
+	DefaultTimeLocation = time.UTC
 )
 
 // ParseDateTime parses a string that represents an ISO8601 time or a unix epoch
@@ -95,7 +104,7 @@ func ParseDateTime(data string) (DateTime, error) {
 	}
 	var lastError error
 	for _, layout := range DateTimeFormats {
-		dd, err := time.Parse(layout, data)
+		dd, err := time.ParseInLocation(layout, data, DefaultTimeLocation)
 		if err != nil {
 			lastError = err
 			continue
@@ -123,6 +132,22 @@ func (t DateTime) String() string {
 	return NormalizeTimeForMarshal(time.Time(t)).Format(MarshalFormat)
 }
 
+// IsZero returns whether the date time is a zero value
+func (t *DateTime) IsZero() bool {
+	if t == nil {
+		return true
+	}
+	return time.Time(*t).IsZero()
+}
+
+// IsUnixZerom returns whether the date time is equivalent to time.Unix(0, 0).UTC().
+func (t *DateTime) IsUnixZero() bool {
+	if t == nil {
+		return true
+	}
+	return time.Time(*t).Equal(UnixZero)
+}
+
 // MarshalText implements the text marshaller interface
 func (t DateTime) MarshalText() ([]byte, error) {
 	return []byte(t.String()), nil