Proposing a new release calendar

[Raphaël Gomès]

Hi all,

This email is in part prompted by the previous releases' delay, but also 
by discussions around release timing we've previously had. 6.0 is very 
likely coming out tomorrow with a delay of 22 days due to a lot of 
issues with Windows Python 3 support. I was going to propose to move the 
6.1 release to March 1st 2022 just this once, but thought about doing 
this more permanently.

With the relatively limited resources we have and the current calendar 
including a release that falls right in the middle of summer where 
activity is lowest and help is less available, I propose that we go back 
to 3 major releases a year with the following calendar:

Freeze date | Major Release | Minor | Minor | Minor
---------------------------------------------------
Feb 15Â Â Â Â Â  | Mar 1Â Â Â Â Â Â Â Â  | Apr 1 | May 1 | Jun 1
Jun 17 Â Â Â Â  | Jul 1Â Â Â Â Â Â Â Â  | Aug 1 | Sep 1 | Oct 1
Oct 18 Â Â Â Â  | Nov 1Â Â Â Â Â Â Â Â  | Dec 1 | Jan 1 | Feb 1

What do you all think?

Raphaël