Travis CI: Fix build error with arch

.travis.yml

@@ -1,18 +1,18 @@
-# vim: set ts=2 sts=2 sw=2 expandtab :
-dist: xenial
-sudo: required
-language: bash
+dist: bionic
+language: shell
+os: linux
 services:
   - docker
+addons:
+  apt:
+    packages:
+      - python3-github
 
 before_install:
   - curl -Ls -o docker-build https://github.com/mate-desktop/mate-dev-scripts/raw/master/travis/docker-build
   - chmod +x docker-build
 
 install:
-  - sudo apt-get install -y python3-pip python3-setuptools
-  - sudo pip3 install --upgrade pip
-  - sudo pip install PyGithub
   - ./docker-build --name ${DISTRO} --config .build.yml --install
 
 script:
@@ -20,14 +20,14 @@ script:
 
 deploy:
   - provider: script
+    edge: true
     script: ./docker-build --verbose --config .build.yml --release github
-    skip_cleanup: true
     on:
       tags: true
       condition: "${TRAVIS_TAG} =~ ^v.*$ && ${DISTRO} =~ ^fedora.*$"
 
 env:
-  - DISTRO="archlinux/base"
+  - DISTRO="archlinux:latest"
   - DISTRO="debian:testing"
   - DISTRO="fedora:latest"
   - DISTRO="ubuntu:20.04"