Update .travis.yml (#69)

Author: GrahamCampbell

.travis.yml

@@ -1,20 +1,22 @@
 
 language: php
 
-sudo: false
-
 matrix:
   include:
     - php: 5.6
+      dist: xenial
     - php: 7.0
+      dist: xenial
     - php: 7.1
+      dist: bionic
     - php: 7.2
+      dist: bionic
     - php: 7.3
-    - php: nightly
-    - php: hhvm
-  allow_failures:
-    - php: nightly
-    - php: hhvm
+      dist: bionic
+    - php: 7.4
+      dist: bionic
+    - php: hhvm-3.18
+      dist: trusty
 
 install:
   - travis_retry composer install --no-interaction --prefer-source
@@ -23,12 +25,6 @@ before_script:
   - mkdir -p build/logs
 
 script:
-#  - bash -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then vendor/bin/phpcs --standard=phpcs.xml ./src/; fi;'
-#  - bash -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then vendor/bin/phpcs --standard=phpcs.xml ./tests/; fi;'
-#  - bash -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then vendor/bin/phpmd ./src/ text phpmd.xml; fi;'
-#  - bash -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then vendor/bin/phpmd ./tests/ text phpmd.xml; fi;'
-#  - bash -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then vendor/bin/parallel-lint ./src/; fi;'
-#  - bash -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then vendor/bin/parallel-lint ./tests/; fi;'
   - bash -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then vendor/bin/phpunit --coverage-clover build/logs/clover.xml; fi;'
   - bash -c 'if [ "$TRAVIS_PHP_VERSION" == "hhvm" ]; then vendor/bin/phpunit; fi;'