Update Travis builds to include PHP 7, update PHPUnit to 5.7

.travis.yml

@@ -1,35 +1,29 @@
-# See https://github.com/silverstripe-labs/silverstripe-travis-support for setup details
+# See https://github.com/silverstripe/silverstripe-travis-support for setup details
 
-sudo: false
+dist: trusty
 
 language: php
 
-php:
-  - 5.4
-  - 5.5
-
-env:
-  - DB=MYSQL CORE_RELEASE=3.5
-
 matrix:
   include:
-    - php: 5.6
-      env: DB=MYSQL CORE_RELEASE=3
-    - php: 7.0
+    - php: '5.6'
       env: DB=MYSQL CORE_RELEASE=3.6
-    - php: 7.1
-      env: DB=PGSQL CORE_RELEASE=3.6 COVERAGE=1
+    - php: '7.0'
+      env: DB=MYSQL CORE_RELEASE=3.7
+    - php: '7.1'
+      env: DB=PGSQL CORE_RELEASE=3.7
+    - php: '7.2'
+      env: DB=MYSQL CORE_RELEASE=3.7
+    - php: '7.3'
+      env: DB=MYSQL CORE_RELEASE=3.7
 
 before_script:
   - composer self-update || true
-  - git clone git://github.com/silverstripe-labs/silverstripe-travis-support.git ~/travis-support
+  - git clone git://github.com/silverstripe/silverstripe-travis-support.git ~/travis-support
   - php ~/travis-support/travis_setup.php --source `pwd` --target ~/builds/ss
   - cd ~/builds/ss
   - composer install
 
 script:
-  - if [[ $COVERAGE ]]; then vendor/bin/phpunit --coverage-clover coverage.xml environmentcheck/tests; fi
-  - if [[ ! $COVERAGE ]]; then vendor/bin/phpunit environmentcheck/tests; fi
+  - vendor/bin/phpunit environmentcheck/tests
 
-after_success:
-  - if [[ $COVERAGE ]]; then bash <(curl -s https://codecov.io/bash) -f coverage.xml; fi

composer.json

@@ -20,6 +20,7 @@
 	},
 	"require-dev": 
 	{
+		"phpunit/phpunit": "^5.7",
 		"hafriedlander/phockito": "dev-master"
 	},
 	"extra": []