Merge version 4:20.12.1-1+rpi1 and 4:21.08.0-1 to produce 4:21.08.0-1+rpi1

diff --cc debian/changelog
index ad9317584d4e63167c0db24dee621e05a1bb82d9,91302b3ac530f2d5348ecaecb017a524ddcd0993..12fde963517a2bccfe5c3713cfd285f7da8e5e0e
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,10 -1,22 +1,30 @@@
- kalgebra (4:20.12.1-1+rpi1) bullseye-staging; urgency=medium
++kalgebra (4:21.08.0-1+rpi1) bookworm-staging; urgency=medium
 +
 +  [changes brought forward from 4:17.08.3-2+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Sat, 16 Dec 2017 12:52:33 +0000]
 +  * Make armhf a non-webengine architecture.
 +  * Fix clean target.
 +
-  -- Raspbian forward porter <root@raspbian.org>  Thu, 21 Jan 2021 01:55:45 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Thu, 02 Sep 2021 20:53:54 +0000
++
+ kalgebra (4:21.08.0-1) unstable; urgency=medium
+ 
+   [ Norbert Preining ]
+   * New upstream release (21.08.0).
+ 
+  -- Norbert Preining <norbert@preining.info>  Mon, 16 Aug 2021 15:47:12 +0900
+ 
+ kalgebra (4:21.04.0-1) experimental; urgency=medium
+ 
+   [ Norbert Preining ]
+   * New upstream release (21.04.0).
+   * Drop Kubuntu from maintainer name.
+   * Add myself to uploaders.
+   * Update upstream signing key.
+   * Update dependencies according to cmake.
+   * Update list of installed files.
+   * Drop patch, upstream dropped plugin system.
+ 
+  -- Norbert Preining <norbert@preining.info>  Fri, 23 Apr 2021 14:21:27 +0900
  
  kalgebra (4:20.12.1-1) unstable; urgency=low
  

diff --cc debian/control
index 28fc175fdd152eae122ddfb2c8cb861e857ef94c,bd6eb55941fbabddfc82ef5f457d5db807db5d91..babb2dd460ee7f924d793c9ae9261590d175d901
--- 1/debian/control
--- 2/debian/control
+++ b/debian/control
@@@ -21,9 -23,10 +23,10 @@@ Build-Depends: cmake (>= 3.16~)
                 libreadline-dev,
                 pkg-config,
                 pkg-kde-tools (>> 0.15.15),
-                qtbase5-dev (>= 5.4),
-                qtdeclarative5-dev (>= 5.4),
+                qtbase5-dev (>= 5.15~),
+                qtdeclarative5-dev (>= 5.15~),
+                qtquickcontrols2-5-dev,
 -               qtwebengine5-dev [amd64 arm64 armhf i386 mipsel],
 +               qtwebengine5-dev [amd64 arm64 i386 mipsel],
  Standards-Version: 4.5.1
  Homepage: https://edu.kde.org/kalgebra
  Vcs-Browser: https://salsa.debian.org/qt-kde-team/kde/kalgebra