Merge branch 'release/focal-fossa' into 'master'

Add support for Focal Fossa (Ubuntu 20.04 LTS)

See merge request !1

.gitlab-ci.yml

@@ -65,6 +65,23 @@ upload/debian/buster:
 ###################################
 # Ubuntu
 ###################################
+build/ubuntu/focal:
+  <<: *build
+  variables:
+    DOCKER_IMAGE: ubuntu/focal
+
+test/ubuntu/focal:
+  <<: *test
+  variables:
+    DOCKER_IMAGE: ubuntu/focal
+  dependencies:
+    - build/ubuntu/focal
+
+upload/ubuntu/focal:
+  <<: *upload
+  dependencies:
+    - build/ubuntu/focal
+
 build/ubuntu/bionic:
   <<: *build
   variables: