Enhancement: Direct builds to container-based infrastructure

Author: localheinz

.travis.yml

@@ -1,27 +1,27 @@
 language: php
 
+sudo: false
+
+php:
+  - 5.3.3
+  - 5.3
+  - 5.4
+  - 5.5
+  - 5.6
+  - 7
+  - hhvm
+
 matrix:
   fast_finish: true
-  include:
-    - php: 5.3.3
-    - php: 5.3
-    - php: 5.4
-    - php: 5.5
-    - php: 5.6
-      env: CHECK_LINKS=true BUILD_DOCS=true
-    - php: 7
-    - php: hhvm
   allow_failures:
     - php: 7
 
 before_install:
-  - composer selfupdate
+  - composer self-update
 
 install:
-  - if [[ "$CHECK_LINKS" == "true" ]]; then sudo apt-get -y install pypy python-sphinx graphviz; fi
-  - travis_retry composer install --no-interaction --prefer-source
+  - composer install --no-interaction --prefer-source
 
 script:
-  - if [[ "$CHECK_LINKS" == "true" ]]; then cd docs && make linkcheck && cd ..; fi
-  - if [[ "$BUILD_DOCS" == "true" ]]; then vendor/bin/phpdoc -d src -t docs-api; fi
+  - vendor/bin/phpdoc -d src -t docs-api
   - vendor/bin/phpunit --coverage-text