Update travis

- Magento 2.4 install requires elasticsearch
- Magento 2.4 no longer allows PHP 7.2

Author: wigman

.travis.yml

@@ -1,6 +1,8 @@
 os: linux
 dist: trusty
 group: edge
+services:
+  - elasticsearch
 addons:
   apt:
     packages:
@@ -13,22 +15,27 @@ addons:
 language: php
 jobs:
   include:
-    - php: 7.3
+    - php: 7.4
       env:
         - MAGENTO_VERSION=2.3
         - TEST_SUITE=integration
-    - php: 7.3
+    - php: 7.4
       env:
         - MAGENTO_VERSION=2.4-develop
         - TEST_SUITE=integration
-    - php: 7.2
+
+    - php: 7.3
       env:
         - MAGENTO_VERSION=2.3
         - TEST_SUITE=integration
-    - php: 7.2
+    - php: 7.3
       env:
         - MAGENTO_VERSION=2.4-develop
         - TEST_SUITE=integration
+    - php: 7.2
+      env:
+        - MAGENTO_VERSION=2.3
+        - TEST_SUITE=integration
 env:
   global:
     - COMPOSER_BIN_DIR=~/bin
@@ -37,9 +44,12 @@ cache:
   apt: true
   directories:
     - $HOME/.composer/cache
-before_script: ./.travis/before_script.sh
+before_script:
+  - |
+    sleep 10
+    ./.travis/before_script.sh
 script: phpunit -c magento2/dev/tests/$TEST_SUITE --coverage-text --coverage-clover=/tmp/coverage.clover
 after_script:
   - |
     wget https://scrutinizer-ci.com/ocular.phar
-    php ocular.phar code-coverage:upload --format=php-clover /tmp/coverage.clover
+    php ocular.phar code-coverage:upload --format=php-clover /tmp/coverage.clover