Improving CI/CD Travis settings

.travis.yml

@@ -1,58 +1,63 @@
 language: php
-
 sudo: false
-
 cache:
-  directories:
-    - $HOME/.composer/cache
-
-env:
-  global:
-    - COMPOSER_ARGS="--no-interaction --prefer-source --no-suggest"
-
+    directories:
+        - "$HOME/.composer/cache"
 matrix:
-  include:
-    - php: 7.2
-      env:
-        - COLLECT_COVERAGE=true
-        - IGNORE_PLATFORMS=false
-        - RUN_PHPSTAN=true
-        - VALIDATE_CODING_STYLE=false
-    - php: 7.3
-      env:
-        - COLLECT_COVERAGE=true
-        - IGNORE_PLATFORMS=true
-        - RUN_PHPSTAN=true
-        - VALIDATE_CODING_STYLE=true
-    - php: 7.4
-      env:
-        - COLLECT_COVERAGE=false
-        - VALIDATE_CODING_STYLE=false
-        - RUN_PHPSTAN=false
-        - IGNORE_PLATFORMS=true
-    - php: nightly
-      env:
-        - COLLECT_COVERAGE=false
-        - IGNORE_PLATFORMS=true
-        - RUN_PHPSTAN=true
-        - VALIDATE_CODING_STYLE=false
-  allow_failures:
-    - php: nightly
-  fast_finish: true
-
+    include:
+        - php: 7.2
+          env:
+              - COLLECT_COVERAGE=false
+              - COMPOSER_ARGS="--no-interaction --no-suggest --prefer-source --prefer-lowest --prefer-stable"
+              - RUN_PHPSTAN=false
+              - VALIDATE_CODING_STYLE=false
+        - php: 7.2
+          env:
+              - COLLECT_COVERAGE=true
+              - COMPOSER_ARGS="--no-interaction --no-suggest --prefer-source"
+              - RUN_PHPSTAN=true
+              - VALIDATE_CODING_STYLE=true
+        - php: 7.3
+          env:
+              - COLLECT_COVERAGE=false
+              - COMPOSER_ARGS="--no-interaction --no-suggest --prefer-source --prefer-lowest --prefer-stable"
+              - RUN_PHPSTAN=false
+              - VALIDATE_CODING_STYLE=false
+        - php: 7.3
+          env:
+              - COLLECT_COVERAGE=true
+              - COMPOSER_ARGS="--no-interaction --no-suggest --prefer-source"
+              - RUN_PHPSTAN=true
+              - VALIDATE_CODING_STYLE=true
+        - php: 7.4
+          env:
+              - COLLECT_COVERAGE=false
+              - COMPOSER_ARGS="--no-interaction --no-suggest --prefer-source --prefer-lowest --prefer-stable"
+              - RUN_PHPSTAN=false
+              - VALIDATE_CODING_STYLE=false
+        - php: 7.4
+          env:
+              - COLLECT_COVERAGE=true
+              - COMPOSER_ARGS="--no-interaction --no-suggest --prefer-source"
+              - RUN_PHPSTAN=true
+              - VALIDATE_CODING_STYLE=true
+        - php: nightly
+          env:
+              - COLLECT_COVERAGE=false
+              - COMPOSER_ARGS="--no-interaction --no-suggest --prefer-source --ignore-platform-reqs"
+              - RUN_PHPSTAN=false
+              - VALIDATE_CODING_STYLE=false
+    allow_failures:
+        - php: nightly
+    fast_finish: true
 before_install:
-  - travis_retry composer self-update
-
+    - travis_retry composer self-update
 install:
-  - if [ "$IGNORE_PLATFORMS" == "true" ]; then travis_retry composer update $COMPOSER_ARGS --ignore-platform-reqs; fi
-  - if [ "$IGNORE_PLATFORMS" == "false" ]; then travis_retry composer update $COMPOSER_ARGS; fi
-
+    - travis_retry composer update $COMPOSER_ARGS
 script:
-  - if [ "$RUN_PHPSTAN" == "true" ]; then composer phpstan; fi
-  - if [ "$VALIDATE_CODING_STYLE" == "true" ]; then composer phpcs; fi
-  - composer phpunit
-  - if [ "$VALIDATE_CODING_STYLE" == "true" ]; then composer phpcs; fi
-  - if [ "$RUN_PHPSTAN" == "true" ]; then composer phpstan; fi
-
+    - if [ "$VALIDATE_CODING_STYLE" == "true" ]; then composer phpcs; fi
+    - if [ "$RUN_PHPSTAN" == "true" ]; then composer phpstan; fi
+    - composer phpunit
 after_script:
-  - if [ "$COLLECT_COVERAGE" == "true" ]; then wget https://scrutinizer-ci.com/ocular.phar && php ocular.phar code-coverage:upload --format=php-clover build/clover.xml; fi
+    - if [ "$COLLECT_COVERAGE" == "true" ]; then wget https://scrutinizer-ci.com/ocular.phar
+        && php ocular.phar code-coverage:upload --format=php-clover build/clover.xml; fi

composer.json

@@ -44,7 +44,7 @@
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.16",
-        "phpunit/phpunit" : "^7.0 | ^8.0",
+        "phpunit/phpunit" : "^8.0",
         "phpstan/phpstan": "^0.12",
         "phpstan/phpstan-strict-rules": "^0.12",
         "phpstan/phpstan-phpunit": "^0.12"