Switching Travis CI builds to Ubuntu Xenial Xerus

.travis.yml

@@ -1,6 +1,6 @@
 language: php
 sudo: false
-dist: trusty
+dist: xenial
 
 cache:
     directories:
@@ -113,6 +113,8 @@ jobs:
     - stage: Test
       php: 7.3
       env: DB=mysql COVERAGE=yes
+      services:
+        - mysql
     - stage: Test
       php: 7.3
       env: DB=mysql.docker MYSQL_VERSION=5.7 COVERAGE=yes
@@ -130,6 +132,8 @@ jobs:
     - stage: Test
       php: 7.3
       env: DB=mysqli COVERAGE=yes
+      services:
+        - mysql
     - stage: Test
       php: 7.3
       env: DB=mysqli.docker MYSQL_VERSION=5.7 COVERAGE=yes
@@ -177,30 +181,22 @@ jobs:
     - stage: Test
       php: 7.3
       env: DB=pgsql POSTGRESQL_VERSION=9.4 COVERAGE=yes
-      services:
-        - postgresql
       addons:
         postgresql: "9.4"
     - stage: Test
       php: 7.3
       env: DB=pgsql POSTGRESQL_VERSION=9.5 COVERAGE=yes
-      services:
-        - postgresql
       addons:
         postgresql: "9.5"
     - stage: Test
       php: 7.3
       env: DB=pgsql POSTGRESQL_VERSION=9.6 COVERAGE=yes
-      services:
-        - postgresql
       addons:
         postgresql: "9.6"
     - stage: Test
       php: 7.3
       env: DB=pgsql POSTGRESQL_VERSION=10.0 COVERAGE=yes
       sudo: required
-      services:
-        - postgresql
       addons:
         postgresql: "10.0"
       before_script:

tests/travis/install-sqlsrv-dependencies.sh

@@ -5,6 +5,6 @@ set -ex
 echo Installing driver dependencies
 
 curl https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add -
-curl https://packages.microsoft.com/config/ubuntu/14.04/prod.list | sudo tee /etc/apt/sources.list.d/mssql.list
+curl https://packages.microsoft.com/config/ubuntu/16.04/prod.list | sudo tee /etc/apt/sources.list.d/mssql.list
 sudo apt-get update
 ACCEPT_EULA=Y sudo apt-get install -qy msodbcsql17 unixodbc unixodbc-dev libssl1.0.0