release: Start preparation for 4.12.4

.bumpversion.cfg

@@ -1,5 +1,5 b''
 [bumpversion]
-current_version = 4.12.3
+current_version = 4.12.4
 message = release: Bump version {current_version} to {new_version}
 
 [bumpversion:file:vcsserver/VERSION]

.release.cfg

@@ -5,12 +5,10 b' done = false'
 done = true
 
 [task:fixes_on_stable]
-done = true
 
 [task:pip2nix_generated]
-done = true
 
 [release]
-state = prepared
-version = 4.12.3
+state = in_progress
+version = 4.12.4
 

vcsserver/VERSION

@@ -1,1 +1,1 b''
-4.12.3
  No newline at end of file
+4.12.4
  No newline at end of file