Flow bugfix releases: 2.3.15, 3.0.9, 3.1.5, 3.2.4

[kdambekalns (Karsten Dambekalns)]

Today four bugfix releases of Flow have been done, here are the details:

• Flow 2.3.15 - ChangeLog / GitHub
• Flow 3.0.9 - ChangeLog / GitHub
• Flow 3.1.5 - ChangeLog / GitHub
• Flow 3.2.4 - ChangeLog / GitHub

Enjoy!