Update travis configuration.

Author: GhaziTriki

.travis.yml

@@ -1,13 +1,12 @@
 language: php
 
 php:
-  - 5.4
-  - 5.5
-  - 5.6
   - 7.0
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
+  - 8.0
   - hhvm
   - nightly
 
@@ -35,6 +34,6 @@ script:
   - if [ "$TRAVIS_PHP_VERSION" == "nightly" ]; then vendor/bin/phpunit; fi
 
 after_script:
-  - if [ "$TRAVIS_PHP_VERSION" == "7.0" ] || [ "$TRAVIS_PHP_VERSION" == "7.1" ] || [ "$TRAVIS_PHP_VERSION" == "7.2" ]; then php vendor/bin/php-coveralls -v; fi
-  - if [ "$TRAVIS_PHP_VERSION" == "7.0" ] || [ "$TRAVIS_PHP_VERSION" == "7.1" ] || [ "$TRAVIS_PHP_VERSION" == "7.2" ]; then wget https://scrutinizer-ci.com/ocular.phar; fi
-  - if [ "$TRAVIS_PHP_VERSION" == "7.0" ] || [ "$TRAVIS_PHP_VERSION" == "7.1" ] || [ "$TRAVIS_PHP_VERSION" == "7.2" ]; then php ocular.phar code-coverage:upload --format=php-clover build/logs/clover.xml; fi
+  - if [ "$TRAVIS_PHP_VERSION" == "7.3" ] || [ "$TRAVIS_PHP_VERSION" == "7.4" ] || [ "$TRAVIS_PHP_VERSION" == "8.0" ]; then php vendor/bin/php-coveralls -v; fi
+  - if [ "$TRAVIS_PHP_VERSION" == "7.3" ] || [ "$TRAVIS_PHP_VERSION" == "7.4" ] || [ "$TRAVIS_PHP_VERSION" == "8.0" ]; then wget https://scrutinizer-ci.com/ocular.phar; fi
+  - if [ "$TRAVIS_PHP_VERSION" == "7.3" ] || [ "$TRAVIS_PHP_VERSION" == "7.4" ] || [ "$TRAVIS_PHP_VERSION" == "8.0" ]; then php ocular.phar code-coverage:upload --format=php-clover build/logs/clover.xml; fi