Changes: document Python work and other deps-updates

CHANGES

@@ -10,15 +10,20 @@ the history of the 3.2 series (2018-05 - 2021-12).
 # 3.3.0 (unreleased) #
 
 This release contains contributions from (alphabetically by first name):
- - No external contributors yet
+ - Vitor Lopes
 
 ## Core ##
+ - CMake 3.16, Qt 5.15 are now required; the newer CMake is to support
+   new features (also for KDE Frameworks), Qt is the current LTS version.
  - KDE Framework "DBusAddons" is now required, and is used to "activate"
    Calamares; the KDAB Single Application Guard is no longer used.
    KDSAG needed patching to chase Qt 5.15 deprecations, and the DBus
    activation code is tried and tested in Frameworks (tier 1).
    Running `calamares -d` no longer enforces a single-application
    (it is for debugging purposes, after all).
+ - Python 3.6 or later is now required, to allow for F-strings in
+   Python code and allow other tidy-ups in the Python modules.
+   Boost::Python now requires 1.67 or later (for CMake support).
 
 ## Modules ##
  - No module changes yet