CREDITS.txt in rufus-scheduler-2.0.18 vs CREDITS.txt in rufus-scheduler-2.0.19

- old
+ new

@@ -2,9 +2,11 @@
 = CREDITS.txt
 
 
 == Contributors
 
+- Lucy Fu (https://github.com/lfu) arg error on <= 0 "every" freq
+- Rainux Luo (https://github.com/rainux) multiple mutexes
 - Andrew Davey (https://github.com/asdavey) "L" in cron lines
 - Stig Kleppe-Jørgensen (https://github.com/stigkj)
 - Danny "northox" Fullerton (https://github.com/northox) negative time strings
 - Marcus Brito (https://github.com/pazustep) CronLine proofing
 - André Luis Leal Cardoso Junior (https://github.com/andrehjr) 1.9.3 patch