Merge pull request #7 from osmhpi/py39

build with Python 3.9 / Debian 11

Author: rs22

.github/workflows/build.yml

@@ -43,7 +43,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: release
     container:
-      image: debian:10
+      image: debian:11
 
     strategy:
       matrix:

ns-3/build.sh

@@ -18,7 +18,7 @@ run apt-get install -y --no-install-recommends \
 	python3-pip \
 	python3-setuptools \
 	python3-wheel \
-	qt5-default \
+	qtbase5-dev \
 	zip \
 	&& true