upgrade mysql

vendor/github.com/go-sql-driver/mysql/nulltime.go

@@ -9,11 +9,32 @@
 package mysql
 
 import (
+	"database/sql"
 	"database/sql/driver"
 	"fmt"
 	"time"
 )
 
+// NullTime represents a time.Time that may be NULL.
+// NullTime implements the Scanner interface so
+// it can be used as a scan destination:
+//
+//	var nt NullTime
+//	err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
+//	...
+//	if nt.Valid {
+//	   // use nt.Time
+//	} else {
+//	   // NULL value
+//	}
+//
+// # This NullTime implementation is not driver-specific
+//
+// Deprecated: NullTime doesn't honor the loc DSN parameter.
+// NullTime.Scan interprets a time as UTC, not the loc DSN parameter.
+// Use sql.NullTime instead.
+type NullTime sql.NullTime
+
 // Scan implements the Scanner interface.
 // The value type must be time.Time or string / []byte (formatted time-string),
 // otherwise Scan fails.