Refresh travis.yml from latest blackboard-open-source/moodle-plugin-ci

Refreshed from https://github.com/blackboard-open-source/moodle-plugin-ci/blob/master/.travis.dist.yml on 2020-06-04, updated with open-lms-open-source/moodle-plugin-ci#115

.travis.yml

@@ -1,35 +1,36 @@
 language: php
 
-sudo: true
-
 addons:
-  firefox: "47.0.1"
   postgresql: "9.4"
-  apt:
-    packages:
-      - openjdk-8-jre-headless
+
+services:
+  - postgresql
+  - docker
 
 cache:
   directories:
     - $HOME/.composer/cache
     - $HOME/.npm
 
 php:
-  - 7.0
+ - 7.1
+ - 7.2
+ - 7.3
 
 env:
-  global:
-    - MOODLE_BRANCH=MOODLE_35_STABLE
-  matrix:
-    - DB=pgsql
+ global:
+  - MOODLE_BRANCH=MOODLE_38_STABLE
+ matrix:
+  - DB=pgsql
 
 before_install:
   - phpenv config-rm xdebug.ini
-  - nvm install 8.9
-  - nvm use 8.9
+  - nvm install 14.2.0
+  - nvm use 14.2.0
   - cd ../..
   - composer create-project -n --no-dev --prefer-dist blackboard-open-source/moodle-plugin-ci ci ^2
   - export PATH="$(cd ci/bin; pwd):$(cd ci/vendor/bin; pwd):$PATH"
+  - docker run -d -p 127.0.0.1:4444:4444 --net=host -v /dev/shm:/dev/shm selenium/standalone-firefox:3
 
 install:
   - moodle-plugin-ci install

version.php

@@ -25,6 +25,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2019011800;         // The current plugin version (Date: YYYYMMDDXX).
+$plugin->version   = 2020060400;         // The current plugin version (Date: YYYYMMDDXX).
 $plugin->requires  = 2014051200;         // minimum: Moodle 2.7.
 $plugin->component = 'block_disk_quota'; // Full name of the plugin (used for diagnostics).