Removed PHP 7.4 from builds in favor of PHP 8.1

Author: snake14

.travis.yml

@@ -4,7 +4,6 @@ language: php
 
 php:
   - 7.2
-  - 7.4
 #  - hhvm
 
 services:
@@ -51,6 +50,15 @@ matrix:
         - composer require --dev phpunit/phpunit ~9.3 --ignore-platform-reqs
         - cd tests/PHPUnit
         - $PIWIK_ROOT_DIR/tests/travis/travis.sh
+    - php: 8.1
+      env: TEST_SUITE=PluginTests MYSQL_ADAPTER=PDO_MYSQL TEST_AGAINST_CORE=minimum_required_piwik SKIP_COMPOSER_INSTALL=1
+      script:
+        - cd $PIWIK_ROOT_DIR
+        - composer install --ignore-platform-reqs
+        - composer remove --dev phpunit/phpunit
+        - composer require --dev phpunit/phpunit ~9.3 --ignore-platform-reqs
+        - cd tests/PHPUnit
+        - $PIWIK_ROOT_DIR/tests/travis/travis.sh
 
 dist: bionic
 
@@ -76,7 +84,7 @@ install:
   - '[ -d ./tests/travis/.git ] || sh -c "rm -rf ./tests/travis && git clone https://github.com/matomo-org/travis-scripts.git ./tests/travis"'
   - cd ./tests/travis ; git checkout master ; cd ../..
 
-  - export GENERATE_TRAVIS_YML_COMMAND="php ./tests/travis/generator/main.php generate:travis-yml --plugin=\"DeviceDetectorCache\" --php-versions=\"7.2,7.4\" --distribution=\"bionic\" --sudo-false --verbose"
+  - export GENERATE_TRAVIS_YML_COMMAND="php ./tests/travis/generator/main.php generate:travis-yml --plugin=\"DeviceDetectorCache\" --php-versions=\"7.2\" --distribution=\"bionic\" --sudo-false --verbose"
   - '[[ "$TRAVIS_JOB_NUMBER" != *.1 || "$TRAVIS_PULL_REQUEST" != "false" ]] || ./tests/travis/autoupdate_travis_yml.sh'
 
   - ./tests/travis/checkout_test_against_branch.sh