Fix compile errors with pinned dependency versions

models.go

@@ -254,7 +254,7 @@ func NewDB(database *sqlx.DB) *dbHandler {
 		var stmt *sqlx.Stmt
 		stmt, err := database.Preparex(sqlStatement)
 		if err != nil {
-			log.Criticalf("ERROR parsing statement %s: %s", sqlStatement, err)
+			log.Critical("ERROR parsing statement %s: %s", sqlStatement, err)
 			failed_statements = append(failed_statements, sqlStatement)
 		}
 		stmt.Close()

notifications.go

@@ -56,7 +56,7 @@ func MailNotifier(quitMailNotifier chan int) {
 			}
 			m.SetBody("text/plain", mailText.String())
 
-			d := gomail.NewDialer(config.MailServer.Host, config.MailServer.Port, "", "")
+			d := gomail.NewPlainDialer(config.MailServer.Host, config.MailServer.Port, "", "")
 			if err := d.DialAndSend(m); err != nil {
 				log.Errorf("sending mail failed: %v", err)
 			}