[PATCH] Travis-CI: upgrade to Ubuntu 18.04 and latest releases of Python and Ruby

[Nicolas Iooss <nicolas.iooss@xxxxxxx>]

* Test Python 3.8 and Pypy3 3.6-7.2.0
* Test Ruby 2.7
* Drop Ruby 2.2 and 2.3 (they are not supported with Ubuntu 18.04 in
  https://rubies.travis-ci.org/)
* While at it, replace deprecated libdbus-glib-1-dev with libglib2.0-dev
  now that restorecond has been upgraded.

Signed-off-by: Nicolas Iooss <nicolas.iooss@xxxxxxx>
---
 .travis.yml | 40 ++++++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 4361d26cbb83..c36e721a5e1d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,33 +11,33 @@ compiler:
 env:
   matrix:
     # Test the last version of Python and Ruby together, with some linkers
-    - PYVER=python3.7 RUBYLIBVER=2.6
-    - PYVER=python3.7 RUBYLIBVER=2.6 TEST_FLAGS_OVERRIDE=1
-    - PYVER=python3.7 RUBYLIBVER=2.6 TEST_DEBUG=1
-    - PYVER=python3.7 RUBYLIBVER=2.6 LINKER=gold
-    - PYVER=python3.7 RUBYLIBVER=2.6 LINKER=bfd
-
-    # Test several Python versions
-    - PYVER=python3.5 RUBYLIBVER=2.6
-    - PYVER=python3.6 RUBYLIBVER=2.6
-    - PYVER=pypy3.5-6.0 RUBYLIBVER=2.6
+    - PYVER=python3.8 RUBYLIBVER=2.7
+    - PYVER=python3.8 RUBYLIBVER=2.7 TEST_FLAGS_OVERRIDE=1
+    - PYVER=python3.8 RUBYLIBVER=2.7 TEST_DEBUG=1
+    - PYVER=python3.8 RUBYLIBVER=2.7 LINKER=gold
+    - PYVER=python3.8 RUBYLIBVER=2.7 LINKER=bfd
+
+    # Test several Python versions (https://docs.travis-ci.com/user/languages/python/#python-versions)
+    - PYVER=python3.5 RUBYLIBVER=2.7
+    - PYVER=python3.6 RUBYLIBVER=2.7
+    - PYVER=python3.7 RUBYLIBVER=2.7
+    - PYVER=pypy3.6-7.2.0 RUBYLIBVER=2.7
 
     # Test several Ruby versions (http://rubies.travis-ci.org/)
-    - PYVER=python3.7 RUBYLIBVER=2.5.1
-    - PYVER=python3.7 RUBYLIBVER=2.4
-    - PYVER=python3.7 RUBYLIBVER=2.3
-    - PYVER=python3.7 RUBYLIBVER=2.2
+    - PYVER=python3.8 RUBYLIBVER=2.6
+    - PYVER=python3.8 RUBYLIBVER=2.5.1
+    - PYVER=python3.8 RUBYLIBVER=2.4
 
 matrix:
   exclude:
     - compiler: clang
-      env: PYVER=python3.7 RUBYLIBVER=2.6 LINKER=gold
+      env: PYVER=python3.8 RUBYLIBVER=2.7 LINKER=gold
     - compiler: clang
-      env: PYVER=python3.7 RUBYLIBVER=2.6 LINKER=bfd
+      env: PYVER=python3.8 RUBYLIBVER=2.7 LINKER=bfd
 
-# Use Travis-CI Ubuntu 16.04 Xenial Xerus infrastructure, "full image" variant
+# Use Travis-CI Ubuntu 18.04 Bionic Beaver, "full image" variant
 sudo: required
-dist: xenial
+dist: bionic
 
 # Install SELinux userspace utilities dependencies
 addons:
@@ -52,7 +52,7 @@ addons:
     - libcap-dev
     - libcap-ng-dev # This package is not whitelisted for the container infrastructure (https://github.com/travis-ci/apt-package-whitelist/issues/1096)
     - libcunit1-dev
-    - libdbus-glib-1-dev
+    - libglib2.0-dev
     - libpcre3-dev
     - patch
     - python3-dev
@@ -78,7 +78,7 @@ install:
   # Download the required python version if it is not installed
   - VIRTUAL_ENV="$HOME/virtualenv/$PYVER"
   - if ! [ -d "$VIRTUAL_ENV" ] ; then
-        curl --retry 10 -o python.tar.bz2 "https://s3.amazonaws.com/travis-python-archives/binaries/ubuntu/16.04/x86_64/${PYVER/python/python-}.tar.bz2"; &&
+        curl --retry 10 -o python.tar.bz2 "https://s3.amazonaws.com/travis-python-archives/binaries/ubuntu/18.04/x86_64/${PYVER/python/python-}.tar.bz2"; &&
         sudo tar xjf python.tar.bz2 --directory / &&
         rm python.tar.bz2 ;
     fi
-- 
2.26.2