Add new timestamp styles

discord/discord-api-docs#7922

Author: sebm253

discord/mentionable.go

@@ -16,7 +16,7 @@ var (
 	MentionTypeRole            = MentionType{regexp.MustCompile(`<@&(\d+)>`)}
 	MentionTypeChannel         = MentionType{regexp.MustCompile(`<#(\d+)>`)}
 	MentionTypeEmoji           = MentionType{regexp.MustCompile(`<a?:(\w+):(\d+)>`)}
-	MentionTypeTimestamp       = MentionType{regexp.MustCompile(`<t:(?P<time>-?\d{1,17})(?::(?P<format>[tTdDfFR]))?>`)}
+	MentionTypeTimestamp       = MentionType{regexp.MustCompile(`<t:(?P<time>-?\d{1,17})(?::(?P<format>[tTdDfFsSR]))?>`)}
 	MentionTypeSlashCommand    = MentionType{regexp.MustCompile(`</(\w+) ?((\w+)|(\w+ \w+)):(\d+)>`)}
 	MentionTypeHere            = MentionType{regexp.MustCompile(`@here`)}
 	MentionTypeEveryone        = MentionType{regexp.MustCompile(`@everyone`)}

discord/timestamp.go

@@ -35,6 +35,12 @@ const (
 	// TimestampStyleLongDateTime formats time as Tuesday, 20 April 2021 16:20
 	TimestampStyleLongDateTime TimestampStyle = "F"
 
+	// TimestampStyleShortDateShortTime formats time as 20/04/2021, 16:20
+	TimestampStyleShortDateShortTime TimestampStyle = "s"
+
+	// TimestampStyleShortDateMediumTime formats time as 20/04/2021, 16:20:30
+	TimestampStyleShortDateMediumTime TimestampStyle = "S"
+
 	// TimestampStyleRelative formats time as 2 months ago
 	TimestampStyleRelative TimestampStyle = "R"
 )