Update Travis builds to include PHP 7

.travis.yml

@@ -1,45 +1,26 @@
 language: php
 
-sudo: false
-
-dist: precise
+dist: trusty
 
 addons:
   apt:
     packages:
       - tidy
 
-before_install:
-  - pip install --user codecov
-
-env:
-  global:
-    - DB=MYSQL CORE_RELEASE=3.6
-
-    # Turn coverage off by default, as it's expensive time wise
-    - COVERAGE=0
-
-    # The path of the module when installed by composer
-    - MODULE_PATH=blog
-
 matrix:
   include:
-    - php: 5.6
-      env: DB=MYSQL COVERAGE=1
-    - php: 5.5
-      env: DB=MYSQL CORE_RELEASE=3.2
-    - php: 5.6
-      env: DB=PGSQL CORE_RELEASE=3.3
-    - php: 5.6
-      env: DB=MYSQL CORE_RELEASE=3.4
-    - php: 5.6
-      env: DB=PGSQL CORE_RELEASE=3.5
-    - php: 5.4
-      env: DB=SQLITE
-    - php: 5.4
-      env: DB=MYSQL
-    - php: 7.1
+    - php: '5.6'
       env: DB=MYSQL CORE_RELEASE=3.6
+    - php: '7.0'
+      env: DB=MYSQL CORE_RELEASE=3.7
+    - php: '7.1'
+      env: DB=PGSQL CORE_RELEASE=3.7
+    - php: '7.1'
+      env: DB=MYSQL CORE_RELEASE=3.7
+    - php: '7.2'
+      env: DB=PGSQL CORE_RELEASE=3.7
+    - php: '7.3'
+      env: DB=MYSQL CORE_RELEASE=3.7
 
 
 before_script:
@@ -49,17 +30,5 @@ before_script:
   - php ~/travis-support/travis_setup.php --source `pwd` --target ~/builds/ss --require "silverstripe/comments" --require "silverstripe/widgets"
   - cd ~/builds/ss
 
-#Execute tests with or without coverage
 script:
-  # Execute tests with no coverage.  This is the fastest option
-  - "if [ \"$COVERAGE\" = \"0\" ]; then vendor/bin/phpunit $MODULE_PATH/tests/; fi"
-
-  # Execute tests with coverage.  Do this for a small
-  - "if [ \"$COVERAGE\" = \"1\" ]; then vendor/bin/phpunit --coverage-clover=coverage.clover $MODULE_PATH/tests/; fi"
-
-#Upload coverage even if there is a failure
-after_script:
-  - "if [ \"$COVERAGE\" = \"1\" ]; then mv coverage.clover ~/build/$TRAVIS_REPO_SLUG/; fi"
-  - cd ~/build/$TRAVIS_REPO_SLUG
-  - wget https://scrutinizer-ci.com/ocular.phar
-  - "if [ \"$COVERAGE\" = \"1\" ]; then travis_retry codecov && travis_retry php ocular.phar code-coverage:upload --format=php-clover coverage.clover; fi"
+  - vendor/bin/phpunit blog/tests