Update travis config.

Author: ADmad

.travis.yml

@@ -2,7 +2,6 @@ language: php
 
 php:
   - 7.0
-  - 7.2
   - 7.1
   - 5.6
 
@@ -13,33 +12,40 @@ sudo: false
 env:
   global:
     - DEFAULT=1
+    - CODECOVERAGE=0
 
 matrix:
   fast_finish: true
 
   include:
+    - php: 7.2
+      env: CODECOVERAGE=1 DEFAULT=0
+
     - php: 7.0
       env: PHPCS=1 DEFAULT=0
 
     - php: 7.0
       env: PHPSTAN=1 DEFAULT=0
 
+    - php: 5.6
+      env: PREFER_LOWEST=1
+
 before_script:
   - if [[ $TRAVIS_PHP_VERSION != 7.0 ]]; then phpenv config-rm xdebug.ini; fi
 
   - if [[ $PHPSTAN = 1 ]]; then composer require --dev phpstan/phpstan:^0.9; fi
   - if [[ $PHPSTAN != 1 ]]; then composer install --no-interaction; fi
 
 script:
-  - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION = 7.0 ]]; then ./vendor/bin/phpunit --coverage-clover=clover.xml; fi
-  - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION != 7.0 ]]; then ./vendor/bin/phpunit; fi
+  - if [[ $CODECOVERAGE = 1 ]]; then ./vendor/bin/phpunit --coverage-clover=clover.xml; fi
+  - if [[ $DEFAULT = 1 ]]; then ./vendor/bin/phpunit; fi
 
   - if [[ $PHPCS = 1 ]]; then ./vendor/bin/phpcs -p --extensions=php --standard=vendor/cakephp/cakephp-codesniffer/CakePHP ./src ./tests; fi
 
   - if [[ $PHPSTAN = 1 ]]; then vendor/bin/phpstan analyse -l 2 src; fi
 
 after_success:
-- if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION = 7.0 ]]; then bash <(curl -s https://codecov.io/bash); fi
+- if [[ $CODECOVERAGE = 1 ]]; then bash <(curl -s https://codecov.io/bash); fi
 
 notifications:
   email: false