fix timezones list (#63)

Canada/East-Saskatchewan and US/Pacific-New can not be found by time.LoadLocation.

Normally timezones should not be removed. Here is explanation, why this two was removed —https://stackoverflow.com/questions/78328589/is-the-list-of-iana-timezones-stable#comment138105389_78332721

datetime.go

@@ -222,7 +222,6 @@ var timezones = []string{
 	"Asia/Taipei",
 	"CST6CDT",
 	"Canada/Central",
-	"Canada/East-Saskatchewan",
 	"Canada/Saskatchewan",
 	"Cuba",
 	"Mexico/General",
@@ -507,7 +506,6 @@ var timezones = []string{
 	"PST8PDT",
 	"Pacific/Pitcairn",
 	"US/Pacific",
-	"US/Pacific-New",
 	"Pacific/Palau",
 	"America/Asuncion",
 	"Asia/Qyzylorda",