ci: use Ubuntu Focal for macOS cross build

.cirrus.yml

@@ -160,10 +160,10 @@ task:
     FILE_ENV: "./ci/test/00_setup_env_native_nowallet.sh"
 
 task:
-  name: 'macOS 10.14 [gui, no tests] [bionic]'
+  name: 'macOS 10.14 [gui, no tests] [focal]'
   << : *GLOBAL_TASK_TEMPLATE
   container:
-    image: ubuntu:bionic
+    image: ubuntu:focal
   env:
     FILE_ENV: "./ci/test/00_setup_env_mac.sh"
 

ci/test/00_setup_env_mac.sh

@@ -9,7 +9,7 @@ export LC_ALL=C.UTF-8
 export CONTAINER_NAME=ci_macos_cross
 export DOCKER_NAME_TAG=ubuntu:20.04  # Check that Focal can cross-compile to macos (Focal is used in the gitian build as well)
 export HOST=x86_64-apple-darwin18
-export PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools python3-dev python3-setuptools xorriso"
+export PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools libtinfo5 python3-dev python3-setuptools xorriso"
 export XCODE_VERSION=11.3.1
 export XCODE_BUILD_ID=11C505
 export RUN_UNIT_TESTS=false