Marcel Taeumel uploaded a new version of ReleaseBuilder to project The Trunk:
http://source.squeak.org/trunk/ReleaseBuilder-mt.203.mcz

==================== Summary ====================

Name: ReleaseBuilder-mt.203
Author: mt
Time: 9 December 2019, 10:30:40.800701 am
UUID: b724e384-eaad-8d40-86ef-a503b8b229d8
Ancestors: ReleaseBuilder-mt.202

Feature freeze! Changes system version to 5.3beta. CI builds should now go to: http://files.squeak.org/5.3beta/

=============== Diff against ReleaseBuilder-mt.202 ===============

Item was changed:
  ----- Method: ReleaseBuilder class>>initialize (in category 'class initialization') -----
  initialize
  
  	QAndA ifNil: [self clearQAndA].
  
  	"We have to be after AutoStart so that Morphic is up and running."
  	Smalltalk addToStartUpList: ReleaseBuilder after: AutoStart.
  
+ 	SystemVersion newVersion: 'Squeak5.3beta'!
- 	SystemVersion newVersion: 'Squeak5.3alpha'!